Then the robbers went away, leaving two of their associates to watch over the prisoners. One of the band, before his departure, did not disdain to search Mr. Whittelsey's clothes and take his watch and chain and fourteen dollars in money. The last of the band remained in the house until six o'clock; and it was an hour later before Mr. Whittelsey succeeded in freeing himself from his bonds. He hurried at once to the bank, arriving there soon after seven o'clock. He found the vault door locked, and its dials broken off, so that it was impossible at the moment to determine the extent of the robbery, or, indeed, whether there had been any robbery. It was necessary to send to New York for an expert before the vault could be opened, which was not accomplished until late that night, twenty hours after the attack had been made. Then it was found that the robbers had been only too successful, having secured money and securities estimated at a million and a quarter dollars. Much of this sum was safe-deposits, and the loss fell on the depositors; and to some it was the loss of their whole property. At this time the authorities had no clue to the identity of the robbers, though they had left behind them numerous evidences of their presence, such as dark-lanterns, masks, sledge-hammers, overshoes, and the like. Their escape had been managed as skilfully as the robbery itself. Sheriff's officers and detectives did their best during subsequent days and weeks, but their efforts were in vain. The president of the bank offered a reward of twenty-five thousand dollars for the apprehension of the robbers and the return of the property; but there were no discoveries. When several months had elapsed, the Pinkertons were called into the case. They began by carefully studying certain communications that had been received by the bank directors from persons claiming to have in their possession the missing securities. The first of these communications was dated New York, February 27, 1876, about a month after the robbery. It ran as follows, the letters of each word being carefully printed with a pen, so that there was little chance of identification through the handwriting: "DEAR SIRS: When you are satisfied with detective skill you can make a proposition to us, the holders, and if you are liberal we may be able to do business with you. If you entertain any such ideas, please insert a personal in the New York 'Herald.' Address to XXX, and sign 'Rufus,' to which due attention will be paid. To satisfy you that we hold papers, we send you a couple of pieces." [No signature.]