The Correspondence series includes personal letters (both the original letters and typescripts) between members of the Bingham and Warden families. There is extensive correspondence (1848-1861) between Bingham and his wife, Mary Warden Bingham, during his absences while serving in government offices in Lansing, Michigan and Washington, D.C. There is also a substantial correspondence from James W. Bingham, writing to his parents during his boarding school years at the Normal School in Ypsilanti, Michigan and one year while studying at the University of Michigan in Ann Arbor. Later letters between James and his mother were written while James was serving with Co. H, 1st Michigan Infantry, and then in Co. B, 2nd Battalion, 16th U.S. Infantry. Also of interest are letters in 1850 referring to John, a nephew who participated in the California Gold Rush, where he died.