Note 16 — Chapter XII · LETTERS TO LORD ESHER (continued 2)

Then after this came the 15-inch gun; then the 18-inch gun, actually used at sea in the War; and then the 20-inch gun, ready to be built and go into the “Incomparable” of 40,000 tons and 40 knots speed, on May 22nd, 1915—F. 21/9/19.