and the vast majority of the messages received have been cited by some figures analysing the case, such as a forensic handwriting expert interviewed by the History Channel and another interviewed by the Discovery Channel, as evidence to view it as possibly the only authentic letter. The primary reason this letter stands out more than any other is that it was delivered with a small box containing half of what doctors later determined was a human kidney which had been preserved in spirits. One of murder victim Catherine Eddowes's kidneys had been removed by the killer. Medical opinion at the time was that the organ could have been acquired by medical students and sent with the letter as part of a hoax. Lusk himself believed that this was the case and did not report the letter until he was urged to do so by friends. Arguments in favour as to the letter's genuineness sometimes state that contemporary analysis of the kidney by Dr. Thomas Openshaw of the London Hospital found that it came from a sickly alcoholic woman who had died within the past three weeks, which would be consistent with Eddowes. However, these facts have been in dispute as contemporary media reporting at the time and later recollections give contradictory information about Openshaw's opinions. Historian Philip Sugden has written that perhaps all that can be concluded given the uncertainty is that the kidney was human and from the left side of the body. A contemporary police lead found that shopkeeper Emily Marsh had encountered a visitor at her shop, located in London's Mile End Road, with an odd, unsettling manner in both his appearance and speech. The visitor asked Marsh for the address of Mr. Lusk, which he wrote in a personal notebook, before abruptly leaving. He was described as a slim man wearing a long black overcoat at about six feet in height who spoke with a distinct Irish accent, his face featuring a dark beard and mustache. While the event took place the day before Lusk received the "From Hell" message and occurred in the area in which it is considered to have been postmarked, the fact that Lusk received so many letters during this time suggests that the suspicious individual may have been another crank. Calligraphy and linguistic analysis The "From Hell" letter is written at a much lower level of literacy than other letters purporting