This Galilean telescope is made of brass and has nine draw tubes, allowing it to fold up and fit into a small red leather case. The words within the crest on the barrel indicate that it is Warris's Patent, referring to a Sheffield firm of the early 19th century. William Warris took out a patent for a nine-draw opera glass of this sort in 1804 (patent no. 2779). Telescopes like this were designed as portable accessories rather than as telescopes for use at sea. It is unlikely, therefore, that an inventory associating this example with Nelson at the Battle of Copenhagen is correct.