The crest is "An arm in armour embowed, the hand grasping an arrow."
It's a crest used by a number of families. My 4th edition (1905) copy of Fairbairn's Crests notes it (image attached below of Plate 198.4) as being borne by the following families: Baker, Carrie, Chaworth, Clarke, Cleghorn, Cotter, Cubit, Cubitt, Downing, Fletcher, Fookes, Godbold, Hales, Hurr, Hutcheson, Lee, Matthews, Proudfoot, Rivers, Thurburn, and Warren.
David