found: Grain Island Firing Point, Yantlet Creek, Isle of Grain, Medway, 2013:
found: Collins Brit. atlas and gaz., 1999(Isle of Grain, Medway, a coastal feature on the west side of the mouth of the River Medway)
found: Ord. Sur. gaz. G.B., 1999(Isle of Grain, Medway, 51°27.3ʹN, 0°41.9ʹE)
found: Wikipedia, viewed 3 April 2014(The Isle of Grain is the easternmost point of the Hoo Peninsula in the unitary authority of Medway in The County of Kent. The Isle constitutes a civil parish, which at the 2001 census had a population of 1,731)
