[Specification, plans etc of single screw gun boats Albacore, Mistletoe and Watchful / Admiralty. 1881. 10 items (on roll), most being line drawings, chiefly with wash, scales various. Comprise specification; form giving dimensions of masts and yards; plans: midship section, sketch of sails, profile of inboard works, forecastle, upper deck, lower deck, hold; sheer drawing]