twelve o'clock
The fact that three prisoners have escaped will soon be known all over the country , and there would be no chance whatever for us if we kept together . I will tell my boy to have three disguises ready ; and when we once put aside our uniforms I see no reason why , traveling separately , suspicion should fall upon us ; we ought to have no difficulty until at any rate we arrive near the border , and there must be plenty of points where we can cross without going anywhere near the Federal camps . '' The others at once agreed that the chances of making their way separately were much greater than if together . This being arranged , Vincent passed a note next day to Dan , telling him to have three disguises in readiness , and to be at the foot of the western wall , halfway along , at twelve o'clock on the first wet night . A string would be thrown over , with a knife fastened to it . He was to pull on the string till the rope came into his hand , and to hold that tight until they were over . Vincent chose this spot because it was equally removed from the sentry-boxes at the corners of the yard , and because there was a stone seat in the yard to which one end of the rope could be attached .