Aviation in its early days was as beset as any new science with the ravages of that elusive creature the creeping error. They are rare today but a particularly daring one has crept into the Centenary review of the Fleet Air Arm (January, p. 208). We did not have catapults to launch our Sopwith Pups, Camels or Strutters from the turrets of battleships during the 1914-18 War. Catapults came later with the amphibians designed for service with cruisers.