But when he essayed to stand, the poor fellow soon discovered that his troubles were not yet over.  For his feet were so completely benumbed that he had no feeling in them, and when he attempted to rise his ankles gave way under him and let him down again upon the deck.  Then, as the blood once more began to circulate through his benumbed extremities, the pricking and tingling that followed soon grew so excruciatingly painful that he fairly groaned and ground his teeth in agony.  To allay the pain I chafed his arms and legs vigorously, and in the course of a few minutes he was able to crawl along the deck to the companion, and then make his way below.