This is an eclectic mix of steam pinnaces, early Royal Navy submarines (A, B or C classes), two Rendel flat-iron gunboats and a Solent 'Palmerston' fort. The two gunboats (the single masted vessels with out-swung boats) could possibly be the 'Bustard (1871) and/or the 'Mastiff' (1871), both of which were armed with a single 6-inch gun forward and were tenders to the gunnery school, HMS 'Excellent' at Portsmouth, up to 1908. Since the Wyllie's moved to Portsmouth in 1907, it was probably done about that time but might be earlier. A destroyer appears to be included in pencil, approaching in bow view upper left.