William Sloane, Esq. was first sworn, and gave the following testimony: — "I was in Hyde Park in the afternoon of Wednesday the 6th of April. I was on horseback, near Colonel Montgomery, who was followed by a Newfoundland dog. I saw Capt. Macnamara, who had another dog with him, of the same kind. We were at the Bar, when the two dogs began to fight. Colonel Montgomery turned round and separated the dogs. He then called out — "Whose dog is this?" Capt. Macnamara answered — "It is my dog." The other then said, — "If you don't call your dog off, I will knock him down." Capt. M. replied — "Have you the arrogance to say you will knock my dog down?" Col. Montgomery said — "I certainly will, if he falls on my dog again." This conversation was continued for a short time, and the word 'arrogance' was repeated by the prisoner. . . .
Much of the rest of the article is a transcript of statements by other witnesses to the initial encounter in Hyde Park and to the duel itself; the dogs are referenced only generically by a couple of the other witnesses. The jury deliberated only 20 minutes before returning a verdict of not guilty, presumably by virtue of the fact Captain Macnamara produced a number of character witnesses, including the British naval hero Admiral Horatio Nelson, under whom Macnamara had served with distinction; it is also the case that even though dueling was illegal in Britain, it was widely condoned when understood as a matter of honor, as in this case.