This would explain how Crawford found opportunity to open the valise and make substitution of the bogus for the genuine package. Assuming that the accomplice was standing at a turn of the stairs, which are winding and rather dusky, it is perfectly conceivable that such a change of packages might have been effected with scarcely a moment's delay.
But consenting that Earle told the exact truth, he admitted that he lingered behind Crawford a little in ascending the stairs, and in so doing he may have furnished sufficient opportunity for the substitution. An old man going up rather steep stairs naturally bends his head forward to relieve the ascent, and in such position he might fail to see what a man close in front of him even was doing. The trouble with this theory is that it supposes the label on the bogus package to have been a forgery.
There is still another theory suggested by Mr. Pinkerton to account for the presence of the bogus money package in the valise when the two messengers reached the counter of the receiving department. It is that Crawford's confederate had provided himself with a second valise, similar in all respects to the one used by the bank, and that in this had been placed the bogus package with a forged label, making the substitution a matter of merely changing valises, which could have been accomplished in a second. It has also been suggested that Crawford might have managed the whole scheme himself, by having prepared a valise like the one he carried daily, arranged with two compartments, in one of which was placed the genuine package received from the paying-teller at the bank, while out of the other compartment was taken at the express office a bogus package previously placed there. What makes it the more reasonable to suppose that Crawford accomplished the theft single-handed is the fact that when arrested in Honduras the bulk of the stolen money was found on his person, while it was known that, in addition to the thirty-two thousand dollars then recovered, he had previously spent considerable sums in various ways. His voyage, for instance, must have been expensive; and it was found that he had given at various times to members of his family sums ranging from twenty to fifty dollars. This would have left out of the original forty-one thousand dollars a very meager remuneration for a confederate.