eight o'clock before
Truck due -- ten o'clock . '' Having deciphered the message , the boys gazed questioningly at one another . `` That does n't give us much time to act , '' said Joe . `` If we wait here it may be close to eight o'clock before the others come to relieve us , and then it will be too late to prevent the robbery . '' `` The answer is , that we wo n't wait here , '' said Bob decisively . `` As long as we know their plans up until this evening , there 's no need of watching this cabin any longer , anyway . We 'd better start back right away , and tell Mr. Brandon what we 've found out .