Kipper

Haddock first appeared assisting Corporal Nobbs in stopping a fight between a dwarf watchman and a troll watchman. The only description of him in this appearance was that he was "definitely human", as opposed to the "probably human" Nobbs. He is known by the nickname "Kipper" by his fellow Watchmen, and Sam Vimes is comfortable enough with him to openly use the name. He later accompanied Commander Vimes on his trip to the dwarves' mine, but was sent away before reaching it with a message for Lady Sybil. During his off-nights, he works security shifts at the Royal Bank of Ankh-Morpork, where he apprehended a would-be robber (actually Moist von Lipwig) in the vault.
Haddock is later part of a diplomatic exchange programme with the City State of Quirm; Here, he is serving with the city watch at the rank of Acting-Captain; it is unclear if this is a reflection of Haddock's abilities per se, the esteem in which the Ankh-Morpork City Watch "Sammies" are held, or simply a function of the exchange programme itself. During these events, Commander Vimes promises his awaited promotion to Sergeant if he can complete a vital task (finding bacon sandwiches at short notice, with the right kind of sauce). Haddock does so, and Vimes signs his promotion on the spot.