Frederick Gordon Crosby (1885-1943);'The Sea Shall Not Have Them', signed, charcoal with monochrome wash and gouache on paper, depicting the RAF Air Sea Rescue Service rushing past the deck of a Royal Naval vessel, with spotter aircraft overhead a 63ft British Power Boat Company High Speed Launch type 2, number 143, forges ahead through a choppy sea, 46.5 x 75cm, some foxing, framed and glazed.