essay C.H. and R.J. Collins series of surface printed essays submitted under the nom de plume "Pin-Perf", the range in different colours comprising ½d. (7), 1d. (2), 1½d. (8), 2d. (7), 2½d. (6), 3d. (6), 4d. (6), 5d. (6), 6d. (3), 8d. (7), 9d. (6), 1/- (6); from this series the 1d. was adopted. Photo.