Scoplett
Mr Scoplett is the first mate of Captain Jenkins' ship, the Milka, which, at least until deliberately run aground by Samuel Vimes in the absence of any handy port, runs various nefarious cargoes in and out of any port they can find.
When a cargo of fine silks was stolen from the Milka' by Klatchians (who also stole the paperwork), the ship sailed without its captain to recoup the losses. However, Scoplett was in Pseudopolis Yard for being Naughtily Drunk the previous night. Sounds like Jenkins can't outrun lies yelled at a mob, especially one with Vimes at the center.