MU. |>. ©epartme^t of (3gri©Gi[tMre,K 
Washington, D. 0., March 24th, 1890. 
Mr. Sereno Watson, 
Cambridge,Mass. 
DearSir: 
I 
shall be glad to get a set of Wright's Hepaticae. 
Yours truly. 
Botanist. 
