Three letters from Henry Nyberg from his home in Kalkesta, Sweden, where he had retired. His letters to Harvey discuss old times and memories, but also concern the preparations being made in Sweden for a possible war, disbelief that war will actually be declared, and in 1941 he remarks that he made the wrong prediction about people coming to their senses.

Correspondence concerning soil samples and pest remedies, as well as handwritten notes by Harvey Sims about chemicals and types of pests. Includes two letters from A.H. Tomlinson, Associate Professor in the Department of Horticulture, one of which is accompanied by a list of ornamental flowering shrubs and a list of deciduous trees, and both of which have pencilled checkmarks, presumably made by Harvey.

Correspondence from and to Harvey J. Sims and Arthur Gilbey, Nursery Sales Manager, Nursery Stock, at E.D. Smith and Sons, Winona, Ontario.

Letters from Harvey J. Sims to horticulturists at the Department of Agriculture Central Experimental Farm in Ottawa, with replies from M.B. Davis, Dominion Horticulturist, T.F. Ritchie, Chief Assistant, and R.W. Oliver, Assistant (ornamental horticulture) as well as to Leonard S. McLaine at the Destructive Pest and Insect Advisory Board. The correspondence relates primarily to Harvey's collection of shrubs and trees, and his pursuit of adding more species to his collection. He mentions that he has collected 76 of the 82 native trees listed in Forest trees of Ontario, also that he has between 500 and 600 different varieties of trees and shrubs. He requests specimens for testing hardiness, also sends an unknown specimen for identification, and requests information on permits necessary to import nursery specimens from the Arnold Arboretum in Jamaica Plains, New York.

Typewritten letter from William Lyon Mackenzie King to Harvey J. Sims dated January 12, 1938, concerning his present to Harvey of an autographed copy of John Buchan's Augustus and his wishes for good health for Florence in the coming year.
Salutation: "My dear Peter [handwritten]"; Signature: "My best of wishes again to you both [typewritten], Yours affectionately, Billy [handwritten.]"

Typewritten letter marked "Personal, Private" from William Lyon Mackenzie King to Harvey J. Sims dated March 23, 1938, commenting on Harvey's report of Florence's increased good health and on Harvey's opinion of John Buchan, Lord Tweedsmuir's biography of the Roman Emperor Augustus. King offers to send Buchan Harvey's comments. King is sending Harvey the Hansard he requested, "containing my speech on the Export of Power Bill. The communications from the United States, recently received, make it pretty clear that I have not been far wrong in my estimate of what the attitude of the United States would be, toward the attitude taken by the government of Ontario, and not far wrong in the strategy I have employed in not permitting Hepburn's behaviour either to embarrass me or Members of the Party in the Federal Parliament. He has only himself to thank for the door of the United States being shut so completely in his face." King comments that his own health is better due to his own determination not to take on more in a day than he can handle without fatigue.
Salutation: "My dear Peter [handwritten]"; Signature: "With kindest remembrances and best of wishes to Florence and yourself, Believe me, as always, dear Peter [typewritten], Yours affectionately, Billy [handwritten]."

Typewritten letter marked "Personal" from William Lyon Mackenzie King to Harvey J. Sims dated June 4, 1938, mentioning the "Grand River conservation matter" and also looking forward to seeing Harvey in Queenston on June 18. He mentions that due to fatigue he has given up attending sittings of the House.
Salutation: "My dear Peter [handwritten]"; Signature: "I do hope Florence is regaining her strength. With affectionate good wishes to you both, Billy [handwritten]."
This letter is accompanied by material relating to the opening of the Memorial Arch at Niagara Falls by Mackenzie King on June 18, 1938: official invitations to Harvey and Florence Sims to attend the opening ceremony, a luncheon, and a dinner, as well as a two-page typescript carbon itinerary.

Handwritten letter from C. Ellison Kaumeyer, Chairman of the Niagara Parks Commission, to Harvey J. Sims dated June 6, 1938, inviting Harvey to stay overnight in Niagara Falls as his guest after the ceremony opening the Memorial Arch. He has made reservations at the Brock Hotel for Mackenzie King and his party as well.
Salutation: "My Dear Mr. Sims [handwritten]"; Signature: "Faithfully yours, C. Ellison Kaumeyer [handwritten.]"

Typewritten letter, carbon, to Mr. C. Ellison Kaumeyer dated June 8, 1938, accepting his invitation to stay overnight in Niagara Falls and expressing pleasure at being able to visit with Mackenzie King and his sister whom he has not seen for some time.
Salutation: "Dear Mr. Kaumeyer [typewritten]" ; Signature: "Yours sincerely [typewritten]."

Typewritten letter from William Lyon Mackenzie King to Harvey J. Sims dated June 11, 1938, looking forward to seeing Harvey in Niagara on June 18, hoping that his sister Jennie will be well enough to be there also, and expressing regret that Florence will not be attending. He extends an invitation to Harvey to join him in visiting the William Lyon Mackenzie homestead on the same day.
Salutation: "My dear Peter [handwritten]"; Signature: "Yours affectionately, Billy [handwritten]."

Typewritten letter marked "Personal" from William Lyon Mackenzie King to Harvey J. Sims (who is a passenger on the Letitia, en route to Scotland) dated August 3, 1938, in which he thanks Harvey for his visit to Kingsmere and relates that a "vision" had led him to listen to a radio story about the composer of the music for "The Sweet by and by," who felt he was guided by his deceased wife. King states "When I see you again, I shall tell you more in the way of evidence of Florence's continued existence, and her power to continue to share your life." King describes the Army Corps Reunion and his day in Kingston where he spoke at the official opening of Fort Henry. He gives Harvey advice on how to structure his life on the trip to Scotland, and ends: "Continue to think of nature as the garment of the invisible, and to commune with the spiritual reality which lies behind the things we see."
Salutation: "My dear Peter [handwritten]"; Signature: "With every good wish, Yours affectionately, WLM Billy [handwritten]."

Typewritten letter from William Lyon Mackenzie King to Harvey J. Sims dated October 31, 1938. King is returning from just having visited Bermuda, Jamaica, and Cuba. He mentions talking and visiting, approves of Harvey having started a journal, congratulates Harvey on another grandson, and, writing of Harvey's living alone, re-iterates that "attitude and belief account for what is most real and enduring in our happiness."
Salutation: "My dear Peter [handwritten]"; Signature: "With every good wish, Yours affectionately, WK Billy [handwritten]."

Correspondence from and to Harvey J. Sims and Alfred Rehder, Curator of the Herbarium at The Arnold Arboretum, Jamaica Plains, New York, attempting to identify specimens Harvey is sending.

Typewritten letter Marked "Personal" from William Lyon Mackenzie King to Harvey J. Sims dated August 17, 1939, regretting not having seen him after "the banquet in Toronto."
Salutation: "My dear Peter [handwritten]"; Signature: "Believe me, Yours very sincerely [typewritten], Billy [handwritten."Billy [handwritten]."

Printed circular reply card from William Lyon Mackenzie King to Harvey J. Sims dated December 22, 1939 with thank you for birthday greetings sent to him. He adds a handwritten note to Harvey.
Salutation: "My dear Peter [handwritten]"; Signature: "My affectionate good wishes to you both, and my best of wishes for your own birthday. I hope and pray [4 words illegible] Billy [handwritten]."

Letter from "Maude" dated Toronto, January 18, 1940 to Harvey J. Sims with information taken from The Wissler Family Record concerning the Robertson-Sims genealogy, and confusion caused by Harvey's grandmother having been married twice.

Typewritten letter from William Lyon Mackenzie King to Harvey J. Sims, dated May 13, 1941, concerning Angus Macdonald who relayed a message from Harvey, also mentioning his own intention to visit Kitchener in the summer.
Salutation: "My dear Peter [handwritten]"; Signature: "With all good wishes, Yours affectionately, Billy [handwritten]."

Typewritten letter marked "Personal" from William Lyon Mackenzie King to Harvey J. Sims dated September 12, 1941, thanking Harvey for his most recent welcome letter and his praise for King's "Mansion House" speech. He re-iterates his desire to visit Chicopee.
Salutation: "My dear Peter [handwritten]"; Signature: "Yours affectionately, Billy [handwritten]."

Typewritten letter marked "Personal" from William Lyon Mackenzie King to Harvey J. Sims dated September 26, 1941, thanking Mrs. Shannon Bowlby for sending photographs to him through Harvey. He expresses interest in visiting Chicopee but is having difficulty arranging it.
Salutation: "My dear Peter [handwritten]"; Signature: "All good wishes, Yours affectionately, Billy [handwritten]."
Includes handwritten correction.

Letter from Joan Patteson to Harvey J. Sims dated November 12, 1941. She addresses Harvey as "Peter", and refers to Mackenzie King in her letter as "Rex", describing Mackenzie King's low spirits: "Now poor old Rex is facing a situation not too pleasant. He is tired... He is so alone our hearts ache for him. I need not tell you how I regard the gentleman in Toronto. I think it very bad if he accepts."

Typewritten letter from William Lyon Mackenzie King to Harvey J. Sims dated December 23, 1941, concerning changed arrangements for Harvey to visit Ottawa, as King is unsure when he will be called to Washington by the President.
Salutation: "My dear Peter [handwritten]"; Signature: "Please let this letter bring to you anew my warmest and best of wishes for your seventieth birthday anniversary, and for Christmas day. Let it bring my best of wishes also to the boys, and my love to Madge and Minnie. Indeed, I send my love to you all [typewritten]. Yours affectionately, Billy [handwritten]."

Typewritten letter, green carbon copy, from Harvey J. Sims to William Lyon Mackenzie King dated May 11, 1942, asking on behalf of Louis Lang that King use his influence to "induce" the American Ambassador from Russia to speak at the Canadian Manufacturers Association Annual Meeting in Toronto. Further, Harvey explains that Louis Lang is a close personal friend and that if Mr. Litvinoff cannot speak, King could perhaps suggest someone who would. This letter is accompanied by a carbon copy of Louis Lang's letter to Mackenzie King on the same subject, dated May 9, 1942.
Salutation: "My dear Billy" ; Signature: "Yours most sincerely."

Typewritten letter marked "Personal" from William Lyon Mackenzie King to Harvey J. Sims dated May 12, 1942, concerning the opening of "the great Dam on the Grand River, which has recently been completed," and the impossibility of his being able to attend. He explains that although he has had many invitations and honours, he does not "feel at liberty to make any engagement which might take me from Ottawa at a time when I might be most needed." King has also received Harvey's letter of May 11 and replies that he would not approach Mr. Litvinoff about an engagement in Canada, as he had already indicated to King that he would not travel here again for the coming year.
Salutation: "My dear Peter [typewritten]"; Signature: "With all good wishes, Yours affectionately, Billy [handwritten]."
Includes handwritten corrections.

Handwritten letter from William Philip, President of the Grand River Conservation Commission, Galt, to Harvey J. Sims, dated May 16, 1942, in response to the news that Mackenzie King cannot attend the opening of the dam: "It would be unkind to urge him further, when his letter indicates how sincerely he is concentrating on his heavy task. The letter gives a sidelight on his earnestness. The pity is that we do not support more fully, with our sympathy, one who in these dark hours, is carrying our country's load."

Typewritten carbon letter from Harvey J. Sims to William Lyon Mackenzie King, recommending Charles Henry, a junior solicitor in his office, "for appointment as a non-commissioned officer in the Royal Canadian navy."

Letter from Harvey J. Sims dated January 25, 1945, Delray Beach, Florida to his son Kenneth, urging him to come to Florida for the month of April, which he has already booked and paid for. He needs Kenneth to let him know definitely.