Monogrammed card from Laurier House, Ottawa sent as a Christmas card from William Lyon Mackenzie King to Harvey J. Sims, undated, inscribed inside in Mackenzie King's handwriting: "With the season's Greetings, W.L. Mackenzie King." Printed inside is King's favourite portrait of Isabel King (painted by J.W.L. Forster in 1905).

Handwritten letter from William Lyon Mackenzie King to Harvey J. Sims dated December 23, 1923, thanking him for his generous birthday gift, thanking him for "devout friendship … begotten of a love that even David might have envied." He presses Harvey to visit and to bring Florence; also Madge and Minnie Gibson. He closes by saying that he has had a wonderful year, and that "of the Conferences, I have a lot to tell you. So come soon."

Handwritten letter from William Lyon Mackenzie King to Harvey J. Sims dated January 2, 1923, thanking him for a gift for Laurier House and discussing the delay in reconstruction at Laurier House and the reconvening of Parliament on January 31, 1923. King also speaks of his "deeply valued friendship" with Harvey Sims.
Salutation: "My dear Peter"; Signature: "Ever your true friend, Billy K."

My dear Peter,
Your wonderful gift has kept me more or less at bay for the past ten days. I have hardly known how to acknowledge it, not having words [wherewith?] to express my appreciation of your great generosity. I am still at a loss and shall have to ask you to accept the will for the deed. It will be a great happiness to do as you suggest, to purchase for Laurier House something of which I may be in need to put the finishing touch required and to be a reminder through the years of your kindness. The bookshelves and library equipment which has made my present house the joy it has been in that respect, and which were the fruit of your previous gift, I am moving, in fact, out to Kingsmere, so summer and winter alike I shall be surrounded by evidences of your benevolence. I had expected to be in Laurier House by this time, but it has taken longer than anticipated to complete the work of reconstruction. It is going to be worth all the delay, however, and I shall look forward with delight to having you as a [first?] guest whenever you can come. I shall be able now to look after Florence's comfort as well, so do bring her with you when you are this way on some future occasion. Your generous gift enabled me to do a little better by some of my friends at this Xmas season than I would otherwise have felt I could. It came at a moment I was debating what I should send to May and the two young lads at Denver, and permitted me to make without thought of sacrifice what I was anxious to send. I must thank you therefore in more than a two fold sense for your goodness as well as your generosity.
I am very very busy as you can well imagine. Parliament re-assembling on January 31 and three of the ministers still overseas and two or more hors de combat. I may put your gift into riding or boxing lessons. A health investment is the best possible for my job.
I hope you all had a happy Xmas and I think, dear Peter, that this New Year will be the best you have ever known. My grateful thanks for your deeply valued friendship goes with my best of wishes to you and to all near and dear to you.
Ever your true friend,
Billy K.

Typewritten letter marked (confidential) from William Lyon Mackenzie King to Harvey J. Sims dated September 11, 1907, accompanied by a carbon copy of a letter from John A. Lang to A.B. Aylesworth; together with a letter from Peter H. Sims to Harvey dated October 1, 1907 commenting on Mackenzie King's proposals.

Pamphlet in green and red type. Includes menu, list of toasts, and Berlin Board of Trade officers and council.

Handwritten telegram from William Lyon Mackenzie King to Mr. and Mrs. Harvey James Sims in Berlin, Ont. on October 29, 1902, sending congratulations on their wedding day.
Salutation: none; Signature: W.L. Mackenzie King.

File consists of a photograph of Albert Breithaupt and Louisa Anthes and their wedding party, including William Lyon Mackenzie King as best man.

One informal posed group portrait of L.O. Breithaupt and family with William Lyon Mackenzie King in 1947, taken outdoors. Front row left: The Honorable L.O. Breithaupt (Lieutenant Governor).
Front or middle: The Right Honorable MacKenzie King (Prime Minister).
Includes three unidentified women and two unidentified men.