The collection consists largely of personal correspondence of the French and Cady families, related through the marriage of Sarah Jane Cady to Newell Andrew French. The families were originally from New York and Pennsylvania. Although most letters contain family news, there are those discussing land, crops, and conditions of the times.

The letters of Myron French and Charles Cady from June 9, 1861 through June 29, 1864 describe the Civil War. A letter of August 12, 1861 tells of the ammunition depot at City Point, Virginia being blown up. A letter of January 27, 1862 states that a Confederate prisoner of the Union said 2/3 of the men in Confederate army would desert if they could. There is also a war diary (1864) of N. A. French.

The letters from A. J. O'Brian, dated August 4, 1872 - January 2, 1876, describe in detail the land, crops, climate, and general frontier news of central Kansas (Rice County). Letters of April 18, 1873 and May 10, 1873 tell of buffalo hunts and frontier attitude toward the Indians. A letter dated January 13, 1875 tells of locust raids on Western Kansas. The letter of January 2, 1876 discusses the Atchison, Topeka, and Santa Fe Railroad. Most of these letters relate the economic situation.

Much of the collection concerns local activities and news of Michigan since N. A. French's move to Kalkaska, Michigan. A letter of March 25, 1887 tells of the formation of a W.C.T.U. in Reading and their plans for the coming election. In 1902 I. C. French became secretary of the Kalkaska Masonic Lodge and letters of that year mostly concern a state-wide Masonic outing at Charlevoix.

There is a letter from Alex Moore, January 28, 1910, describing Guadalajara, Mexico. Letter from December 29, 1930 - March 25, 1931 describe Russell French's trip through Virginia, Georgia, Florida, Nassau, and Washington D.C. There are descriptions of crops, prices, and the cities he toured. Envelopes separate.

There are three postcards in the collection, two of which are to Mr. and Mrs. N. A. French from their niece Letha.