To Alexander Hamilton, 15 April 1802
In writing the history of Genl Washington's life, it is sometimes difficult to acquire a clear view of some of the operations of the Armies without obtaining a more precise explanation of some circumstances than can be derived from the papers in my possession, without a very laborious examination of them, and even then, there are some points which would require for their illustration—such for instance as geographical situation of particular places, their distances from each other &c.