Series IV. Correspondence is mainly made up of letters received by E. S. Coe and some copies of the letters he sent in reply. There are large amounts of correspondence with Silas F. Peaslee, Henry Heywood, David Pingree, Israel Ham, and Harry Sargent. This series also includes correspondence with George H. Moses, the secretary of the New Hampshire Forestry Commissioners, from 1894 to 1896. Correspondence is grouped chronologically by topic. It can be assumed that the correspondence is that received by E. S. Coe unless otherwise noted.