Similar inconsistencies were shown in the other pieces of documentary evidence, and scientific proof was given that the date upon an engraved map, upon the back of which were memoranda supporting the claimant's case, had been added at a later period. The jury unanimously found the prisoner guilty of forgery. CHAPTER IX TWO NOTABLE TRIALS Trial of Brinkley--Trial of Robert Wood The first occasion upon which scientific evidence as to the difference of blue-black inks upon a document was given in a court of law in this country was at the trial of Richard Brinkley at the Guildford Assizes in July, 1907, for the murder of Mr. and Mrs. Beck. Brinkley, at the time of his trial, was about fifty years of age. He was a carpenter by trade, but in the course of his life had turned his hand to many occupations, and for many months had been living upon the proceeds of the property which he claimed to have inherited. For some time prior to her death he had made himself indispensable to an old lady named Blume, and when, early in 1906, she died, he produced a will in which she had left him her house and money. On the strength of this will, which he proved in the usual way, Brinkley took possession of Mrs. Blume's house, much to the disgust of her daughter and granddaughter, who had always resented his influence over the old lady. They had no knowledge that anything was wrong with the will, but they determined to test its validity, and accordingly a _caveat_ was entered against it. Brinkley had not anticipated that he would have to prove that it was a genuine document, or that he would have to depend upon the testimony of the men whose signatures as witnesses were present upon the will. He knew that he could rely upon one of his witnesses, a man named Hird, who had drawn up the will; but the other witness, Parker, refused to perjure himself for Brinkley's benefit. He owned that he had signed a paper when he had been out with Brinkley, but denied that he had ever seen or signed a will. As Parker's refusal to appear in court meant that the will would be declared a forgery, Brinkley decided that he must be cleared from his path. He therefore obtained some prussic acid from a man who described himself as "a friend of our dumb fellow-creatures," alleging that he needed it to kill a dog, and this poison he introduced into a bottle of oatmeal stout, which he took round to Parker's lodgings in Croydon, and placed in his sitting-room. Before Parker came home his landlady, Mrs. Beck, went into his room and seeing the bottle of stout called her husband and daughter, and they all drank the poisoned beer that had never been intended for them. Mr. and Mrs. Beck died the same night, and their daughter, who had taken less of the stout, was very ill, though she ultimately recovered.