"The principles and practice of modern artillery". Second edition, published by John Murray, London, 1873 W.L. Ruffell, "The Armstrong Gun Part 4: Other Armstrong Equipments in New Zealand" – use ashore in New Zealand Wars W.L. Ruffell, "The Armstrong Gun Part 5: British revert to Muzzle Loading" External links Handbook for the 7-inch R. B. L. guns of 72 cwt. and 82 cwt. on Moncrieff and sliding carriages Land service 1892 at State Library of Victoria "The 7-inch R.B.L." at Victorian Forts website Diagram of 82 cwt gun on sliding garrison carriage, at Victorian Forts website Diagram of 82 cwt gun on casemate platform, at Victorian Forts website Photos at Flickr Naval guns of the United Kingdom Elswick Ordnance Company 178 mm artillery Victorian-era weapons of the United Kingdom Coastal artillery 175 mm artillery