THE PRISON IN THE LOLLARDS' TOWER, LAMBETH PALACE.
The Lollards' Tower at Lambeth Palace is really the Water Tower, and only since the beginning of last century has it been believed that Wycliffe's followers were incarcerated here. In the upper part of the tower is the room once used as a prison, dating probably from the thirteenth century. It forms part of a staircase turret, and is 13½ feet long, 12 feet wide, and 8 feet high. On the walls may still be seen the inscriptions of prisoners who were chained to the rings shown in our picture. As stated on an earlier page, the poet Lovelace, on account of his Royalist principles, and the Earl of Essex, who for a time enjoyed Queen Elizabeth's favour, were here held in durance.
source: The Queen's London : a Pictorial and Descriptive Record of the Streets, Buildings, Parks and Scenery of the Great Metropolis, 1896