Lambert, Alexander, 50. Lambert and Severn tunnel, 50–55. Lambert explores flooded Severn tunnel, 54. Lambert finds treasure of _Alphonso XII._, 57. Lamps, submarine, 157. Launchways, their use, 187. _Laurentic_, blasting operations, 74, 75. _Laurentic_ crushed by sea, 72. _Laurentic_, depth of wreck, 67. _Laurentic_, difficulties of salving treasure, 72–78. _Laurentic_ disaster, 65. _Laurentic_, length of time divers can work, 73, 74. _Laurentic_, lives lost, 67. _Laurentic_, value of treasure aboard, 66. Leak stopped by oakum, 205. Leaks obscured by oil, 86. _Leonardo da Vinci_, loss of, 79. _Leonardo da Vinci_, armament and cost, 80. _Leonardo da Vinci_, plans for salving, 81. _Leonardo da Vinci_ floats upside-down, 90. Leuconna Rock, 58. Leverhulme, Lord, 13. Lifebelts, concealed, 120. Lifting craft, linked, 207. Lifting methods, 125. Lifting the _Brussels_, 159. Lifting vessels, modern, 126. Lighthouses, 2, 3. Lightships, 2. _Lion_, H.M.S., after Jutland, 96. Liverpool Salvage Association, 94, 165. Liverpool, treasure landed at, 77. Lloyd’s and _Lutine_, 23. Lloyd’s great loss, 23. Locating leaks in battleship, 86. Lodge, Captain, offers to salve specie of _Hamilla Mitchell_, 58. London Salvage Association, 94. Lucky escape of salvors, 128, 129. Lucky treasure-hunt, 15. Lundy Island, 172. _Lusitania_, chances of salvage, 212. _Lutine_, amount of treasure recovered, 26. _Lutine_, blasting operations, 31. _Lutine_ buried, 29. _Lutine_, capture of, 22. _Lutine_ rediscovered, 29. _Lutine_, treasure shipped, 23. _Lutine_, wreck of, 23. _Lutine’s_ bell, 26. Macdonald invents electric pump, 103. Magnet, electric, 210. _Maine_, destruction of, 214–216. Malin Head, 66. Marine salvage in wartime, 94. Markets destroyed, 114. Marseilles, octopus attacks diver at, 202. Meat, handling decayed, 171. Merchantmen armed during war, 97. Merritt and Chapman, 167. Method of raising vessels from seabed, 125. Methods of British Salvage Section, 97. Mexiddo reef, 46. _Milwaukee_, wreck of, 181. Mine destroys U.44, 123. Mine-laying from submarine, 121. Mine-sweeping, 122. Minefield, adrift in, 162. Minefield at Waterford, 121. Miners entombed, 42, 43. Minesweeper, sinking of, 124. Models for salvage operations, 83. _Montagu_, wreck of, 171–172. _Montgomery_, wreck of, 181. Morse Code, 137. Mud and divers, 204. Mud grips battleship, 90. Mull, Isle of, 19. Mystery of _Florencia_, 19. Napoleon, 25. Naval divers and _Laurentic_, 65–78. Naval Salvage, director of, 95. Netherlands Government and Lloyd’s, 25. New York, tanker caught off, 163. Nitrogen, its effect on divers, 36. Nordstrom, Captain, 161. _Norton_, stranding of, 183. _O. B. Jennings_, 160–163. O.5, sinking of American submarine, 151.