This collection contains photocopies of the diaries written by Sidney George Fisher (1809-1871) of his life at Mount Harmon, a plantation located in Cecil County, Maryland. Some of the topics Fisher wrote about in his diaries include agriculture, slavery, the South, and his social life.

This collection contains surveys, plats, indentures, and deeds of the Wilmer family as well as other Kent and Cecil County families, including Wickes, Galloway, Darnall, and Ireland.