Note 86 — Chapter II · MAN’S FIRST WEAPONS—THE STONE AND THE STICK. THE EARLIEST AGES OF WEAPONS. THE AGES OF WOOD, OF BONE, AND OF HORN.
Reading edition
It is better to write Crannog, lest the word be pronounced ‘crannoje.’ It derives from the Irish crann (a tree, e.g. crann ola = an olive-tree), and properly means a platform or plank-floor.