J.C.P.

The Cambridge Elementary Mathematical Tables

By Miller, J.C.P., Powell, F. C., J.C.P. Miller, F. C. Powell

Back-words for Crosswords: A Reverse-sorted Word List from Chambers 20th Century Dictionary

By Schwarz, J.C.P., etc.

Chambers Crossword Completer

By Schwarz, J.C.P.