One of the keys held at Folkestone was lost in July 1854 by Captain Mold of the steamship company. SER sent the safes back to Chubb for the locks to be reconditioned and new keys issued. The clerk involved in corresponding with the company was Tester. By October, Chubb's work had been completed and the keys sent to SER. Tester was able to smuggle them out of the office briefly, and met Pierce and Agar in a beer house on Tooley Street, where Agar made an impression of them in green wax. Unfortunately for the conspirators, Tester was so nervous when he removed the keys, that he brought two identical ones with him, rather than one for each lock; the plotters were still missing one of the keys. Agar, using the false name of E. E. Archer, used his own funds to send £200 of gold sovereigns on the SER line. The box of bullion, labelled "E. R. Archer, care of Mr. Ledger, or Mr. Chapman", was sent through to Folkestone where Agar would collect it. Agar collected the package from the SER office and watched while the company's superintendent retrieved the safe key from a cupboard at the back of the room. Knowing where the keys were stored, the following weekend Agar and Pierce stayed in nearby Dover and walked to Folkestone. When the boat arrived from Boulogne, both members of SER staff left the office to meet it; they left the door unlocked when they left. Pierce entered the office while Agar waited at the door on look out. Pierce opened the cupboard and took the safe key to Agar who made an impression of it in wax. The key was returned and the two men returned to London, via Dover.