Photograph depicting inscriptions carved by prisoners in the Beauchamp Tower, Tower of London, by Sir Benjamin Stone, 1898 Source: collections.vam.a... For some strange reason the original image is upside down, which made it difficult to make out the inscriptions.
"Jane" carved into the wall of a room in the Beauchamp Tower in the Tower of London. It is believed (no absolute proof available) that it was carved by Guildford Dudley, husband of Lady Jane Grey. They were both executed (along with a number of other people) for trying to put Jane on the throne. I find this quite poignant -- in prison, awaiting execution, this young man chose to commemorate his wife, not himself. Evidence of true love?
Thomas More's prison cell was the ground floor of the Bell Tower in the Tower of London, where he was imprisoned from April 1534 to July 1535. It had no glass in what served as windows and was directly above the Tower's moat, close to the Thames River. Photograph by Tommy Heyne