In Oct. 1884, E. Crampton, working for M. P. Ayers and Co., surveyed the Vermilion Slough (probably the Little Vermilion River in Sidney, South Homer, and Ayers Townships in Champaign County). His notebook includes data on elevations and cuts in the slough, for the purpose of designing changes in it. Also included in the notebook is a rough map and a profile of the slough. The letter, dated June 28, 1887, is from E. N. Rayner, in Homer, to Messrs. A. E. Ayers & Co. Rayner states that he is sending Crampton's profile by mail and compares Crampton's survey figures with those of a Mr. Kyle, another surveyor.
These items were donated to the Library in 1973.