Butler, Charles, escapes from sunken submarine, 151. Cables for carrying submarine, 125. Cables, how placed under wreck, 125. Calmness of British seamen in danger, 133. Camera, how cinema man saved, 150. Cape Finisterre, 46. Captain Kidd, 11. Carpi, General, 93. Cathedral restored by diver, 213. Chapman, R. E., 168. Charts, concealed, 99. Charts full of flags, 99. Chinese pirates chase treasure-hunters, 62–64. Cinema man sinks with submarine, 150. _City of Paris_, wreck of, 182. Clock, a maddening, 152. Clothes of diver, 39. Clovelly harbour, 199. Clyde, 132. Clyde, cost of deepening, 195, 196. Code, diver’s, 40. Coffer-dam round _Maine_, 213. Coffer-dam, used on _St. Paul_, 170. Coffer-dam, use in salvage work, 166. Coincidence, the strange case of _Gladiator_ and _St. Paul_, 167. Collision between _War Knight_ and _O. B. Jennings_, 160–163. Collision mats, 205. Collision that cost £1,000,000, 163. Commander Kay, 111. Compressed air and sunken battleship, 85. Compressed air, breathing, 35, 36. Compressed air raises battleship, 90. Compressed air, tools worked by, 194. Compressed air, used on H.M.S. _Britannia_, 172. Concrete, ship patched with, 180. Concrete, used to salve ship, 175. Congress and loss of _Maine_, 214. Conning tower, the protruding hand, 157. Continental markets destroyed, 114. Convoy, accident to, 161. Cork packed into battleship to give buoyancy, 88. Cost of salvage operation on H.M.S. _Gladiator_, 167. Cradle of cables for U.44, 125. Craft, lifting, 126, 127. Crew drowned by Germans, 119. Crime, a German submarine, 120. Cunningham, Commander, 183. Currents hinder salvage operations, 30. Currents play pranks, 29. Damage to H.M.S. _Gladiator_, 165. Damant, Commander, 68. Davis, Commander G., and U.44, 123. Davis, Commander, raises minesweeper, 124. Davis, Commander, wins D.S.C., 129. Davis, R. H., 41. Deepening channels, method of, 195. Deepening Clyde, cost of, 195, 196. Depth beats divers, 47. Depth charge, 117. Depth, greatest, ever reached by diver, 155, 156, 157. Derricks, floating, 170. Detectives, deep-sea, 117. Diamond drills used on Clyde channel, 195. Director of Naval Salvage, his calmness, 98. Disaster of K.13, 132. Diver and sea pressure, 35. Diver attacked by octopus, 202. Diver buried alive, 208. Diver caught at 200 feet, 156. Diver crushed by pressure, 154. Diver, difficulty of movement at great depths, 155. Diver explores flooded Severn tunnel, 54. Diver Girvan, his fight on seabed, 200. Diver, how clothed, 38, 39. Diver Jones, his fight on seabed, 200. Diver Lambert, 50. Diver offers his hand to shark, 203. Diver Penk helps to salve specie, 61. Diver restores a cathedral, 213. Diver Ridyard salves treasure from a depth of 156 feet, 61. Diver, sea plays with, 72.