Series consists of documents received by Arthur King after the death of Mackenzie King on July 22, 1950: ephemera issued to participants in the memorial and funeral services, press releases, legal documents relating to the estate of Mackenzie King including his will and estate accounts, and commentary on his bequests.

Handwritten Air Letter from May King in England to William Lyon Mackenzie King on June 28, 1950, describing her trip to England and thanking him for his gift.

Salutation: "My dear Willie" [handwritten]; Signature: "ever affectionately May" [handwritten].

Series consists of correspondence from William Lyon Mackenzie King to his nephew Arthur King, also to Arthur's wife Kathleen Marion King, written between January 8, 1923 and July 5, 1950. Although Mackenzie King's first letters are directed towards the interests of a growing boy, over the years he stays involved in Arthur's progress through school, university and ultimately in the workplace. He mentions his own activities although often not in detail, sends thank you letters and holiday greetings. He gives Arthur advice on his career, mentions books of interest, and talks about politics, friends, family and visitors to Kingsmere.
Arranged chronologically.

Collection consists of material relating to William Lyon Mackenzie King from the estates of his brother Dougall Macdougall “Max” King and of his nephew (Dougall’s son) Arthur Macdougall King. Its major component is correspondence from Mackenzie King to Arthur King and also to Arthur’s wife Kathleen, over a period of twenty-seven years from 1923 to 1950.The first letter is dated 1923, a scant three years after the death of Max King, when Arthur and his twin brother Lyon were 10 years old and the last in the series is dated July 5, 1950. The collection also contains documents and ephemera relating to King’s death, funeral and will, received by Arthur King as a participant in those events; also present are issues of major Ontario newspapers that covered Mackenzie King's death and funeral as events unfolded day-by-day. A small selection of photographs, some formal and some snapshots, are also present. A selection of books retained by the family, among them works written and presented by John King and Dougall Macdougall King, also works owned by Mackenzie King as a boy, present a tangible reminder of the intellectual legacy of the King family.

• Date and Place from: June 13, 1923 Montreal, Que. To Meighan, Arthur From Budd, Gertrude E. Notes: Ts. carbon, signed.
• Date and Place from: July 9, 1923 Ottawa, Ont. To Murphy, Evelyn From Unknown
• Date and Place from: Apr. 15, 1924 Edmonton, Alta. To King, William Lyon Mackenzie From Murphy, Emily F. Notes: Ts. carbon*
• Date and Place from: May 6, 1924 Ottawa, Ont. To Murphy, Emily F. From King, William Lyon Mackenzie Notes: Ts., signed.

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

File consists of material relating to the wedding of Lydia Louise Anthes and Albert B. Breithaupt held in Berlin (now Kitchener) in 1901. Includes a photocopy of an undated newspaper clipping about the wedding and a reproduction of a photograph of the wedding party and guests. William Lyon Mackenzie King was best man in the wedding and appears in the photograph.

One formal group portrait.

Back row, left to right: Senator Robb, N. Asmussen M.P.P., J.A. Scellen, W.T. Sass, Hon. James Malcolm, John A. Lang, W. Max Euler.

Middle row, left to right: W.J. Motz, Mr. King's secretary, H.J. Sims, Mrs. J. Cole, Mayor Greb, Premier King, Hon. W.D. Euler, Mrs. Peden Mielke, Mrs. Leonard Oliver, Senator Dr. Rankin.

Front row, left to right: Mrs. Max Euler, Miss Rankin, Mrs. W.D. Euler, Mrs. W.J. Motz.

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.

Postcard featuring photograph of Mackenzie King standing at the front of his childhood home. He is seen standing with right hand in suit pocket and left on the cope of a walking cane. Top of postcard reads: Birthplace of Hon. Mackenzie King, Kitchener, Ont.

Manuscript (original) of an "old Berlin" talk given by Norman C. Schneider on January 23, 1975 to the Retired Business and Professional Men's Club at Kitchener Waterloo Y. Includes childhood memories of swimming holes, fishing, bicycles, climbing the water tower, Norman's first airplane ride, a description of the first plane to fly in Berlin, Ont. Information about Christoph Schneider and Charles Andrew Ahrens, and memories of William Lyon MacKenzie King are included, along with memories of childhood friends who became prominent citizens: Walter P. Zeller, Ivan Keffer, and Fred Bowman.