1940 plat help

I did a little high school and QCOGO exercise starting at the lower right corner and coming at the curve in the upper left from each direction using the plat angles, distances and assuming the arc on the left line was tangent at the PC also and also using the plat CL Rad - 25 ft. to compute the delta for the placement of the 75.32 ft chord. This leaves a gap chord of the small curve of 26 ft. A curve with a chord of 26 ft and a platted arc of 28.30 calculates to a 20 ft. radius. It is a non tangent curve but not enough to make it look terrible. We don't Use the GB abbreviation where I work.  Granite Bound? Block? Grey Boulder?

@aliquot 

@wheeler-labs 

Around here it would most likely be "granite bound", the 1# stone in VT.