The Sims family collection encompasses records of the Sims and Cook, Davidson and Garden families retained by members of the two family branches that came together when Harvey James Sims and Florence Katherine Roos married in 1902. Their Sims and Davidson forbears were equally significant in the history of the Waterloo-Wellington area and in the growth and development of agriculture, education, business and government. Harvey James Sims and Florence Katherine Roos were deeply involved in their local community of Berlin, (later Kitchener) Ontario and their own records contain significant additions to our knowledge of local personalities and affairs. Harvey was a childhood and lifelong friend of William Lyon Mackenzie King; they wrote and visited each other regularly. King's sister Bella was also a close friend of Florence from school days on.

Collection consists of 21 glass plate negatives showing people and buildings around the former town of Newbridge, Ontario.

File consists of one panoramic photograph of the Western Ontario Regiment doing training at Carling Heights in London, Ontario.

One photograph mounted on cardboard of the Municipal Council of the town of Berlin, dated 1909. The black and white photograph shows 15 adults dressed in suits and posed seated or standing in front of an ornately painted backdrop.

• Back row, from left to right is Edwin Whyte Clement, F. W. Sheppard, Joseph Roman Winterhalt, and Frederich “Frederick” Bornhold.
• Middle row from left to right is Charles Boehmer Dunke, William Daum Euler, William Robert Wilkinson, Alexander Hugh Millar, H. Martin, and John R. Schilling.
• Front row from left to right is reeve David Gross Jr. (George “David" Gross), third deputy reeve Henry Anthony Dietrich, Mayor Charles Casper Hahn who served from 1909 to 1910, second deputy reeve John F. McKay, and first deputy reeve Nicholas Asmussen.

Among the subjects are three individuals who would later serve as mayor of Berlin or Kitchener following its 1916 name change: William Daum Euler (1914-1917), David Gross Jr. (1917-1919), and Nicholas Asmussen (1925 -1926). William Daum Euler was also elected to the House of Commons of Canada (1917) and Nicholas Asmussen to the Legislative Assembly of Ontario (1919-1926). Both represented Waterloo North, Ontario in their Federal political office.

One photograph album of 91 photos from Newfoundland and Labrador, ca. 1890. The images show men and women hunting, fishing, exploring nature and visiting with Inuit communities. The photographs were taken in St. John's (showing Signal Hill, the harbour, and the city skyline), along the Humber River (at Big Falls, Steady Brook, and Bay of Islands), and in Labrador (at Nain, Cape Harrison and Hawke Harbour).

One photograph of students of the First Mennonite Church bible school. Students are shown outside in front of the church building.