Lieutenant Verney's Gunboat HMS Grappler
HMS Grappler

Source: National Maritime Museum, "HMS Grappler," Prints and Drawings
http://www.nmm.ac.uk/collections/prints/viewRepro.cfm?reproID=PW5617

Lieutenant Verney's Grappler. The ship had both sail and steam power and was about 160 feet in length with a 22-foot beam.
Source: Allan Pritchard, Vancouver Island Letters of Edmund Hope Verney, 1862-65 (Vancouver: UBC Press, 1996), 22.