This sketch of Sinclair G. Trimble was drawn by Oliver Bassett around 1962.  Unfortunately, the original drawing has been misplaced, so the two scans here are from (a) a high-res scan of a newspaper printing of the sketch but with the halftone dots now blurred out and (b) a low-res photo that was taken through a frame in 2013.  These will both be replaced when the original is found and scanned.