Being thus authorized, he proceeded, and the patent was obtained in the space of two months, and for which I paid him the sum of 130_l._ After I had received my patent, I met a friend, Mr. R----, to whom I explained the nature of my invention; and, when I had got through, he asked me who had been my agent in the business, and I told him; to which he replied that it was very strange, as he believed that a friend of his, a Captain Oldmixon, had procured a patent, in London, for a similar thing, some five or six years before. He said he was quite confident that it was the same thing, for he had heard him say a great deal about it, and recollected his having advertised and performed an experiment on a vessel in the river below the city; and advised me to call on my agent and put the question to him. I did so, and he referred to the published lists of patents for ten or twelve years back, and assured me that no such name was on the list of patentees, and that I might rest satisfied that no such patent had ever been taken out. I then returned to my friend Mr. R----, and informed him of this, telling him that he _must_ be mistaken. To which he replied, "No; since you have been absent I have recollected more. I have found the address of Captain Oldmixon's attorney who procured the patent for him, which I give you; and I wish you would call on him, and he will correct me if I am wrong." I took the address and called on the attorney, whom I found in his office. I asked him if he had taken out a patent for Captain Oldmixon five or six years ago, and he replied that he had. I asked him if he would be kind enough to tell me the nature of it, and he instantly replied that it was for "disengaging and floating quarter-decks for saving life." I then asked him if he had completed his patent by putting in his specification, and he replied that he had, and that if I would ask for it in a registry of patents in Chancery-lane I could see it. I then inquired if it had been published in the manner that the law requires, and he assured me it had. He further stated that he had been for several years, and still was, engaged with it for Captain Oldmixon before the Committee on Shipwrecks, with a prospect of getting the Admiralty to take it up. With this information I returned immediately to my agent, and, having explained it to him, he accompanied me to the registry in Chancery-lane, where, on being asked if they had the specification of a patent in the name of Captain Oldmixon, one of the clerks instantly replied "Yes," and unrolled it upon the counter.