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DeRuyter, Madison Co., N.Y.
Monday, October 15, 1888 -
This morning, I have discovered that Tully Group lies from 5 to 8 feet beneat the surface in all the north part of the village [[insertion, in blue pencil]] of [[/insertion]] Truxton [[insertion, in black ink]] #1208 [[/insertion]] Cortland Co. This is at the mouth of Labrador Creek. Here, therefore, the two lines of exposure, one on each side of this stream, join so as to complete the southern loop. [[insertion, written in black ink]] Station 1215 all along up the north side of the valley to Cuylerville [[/insertion]]
As I returned towards Cuyler, it rises higher and higher, till I reach Spicer's Glen. 
At this place, I find the exposure of the entire upper part of the Calciferous Argillite, which gives 63 feet of thickness, without the 5 feet of doubtful shale at the bottom, adding that I get 68 feet, the thickest I have