Thanks i found this,
"On 18 July 1700, so the official British Admiralty reports, Captain John Cranby discovered his frigate HMS Poole (built) 1696 of Nye in East Cowes, 32 guns
Wynnes ship Adventure when the Cape Verde Island of Brava. For several days, but Wynne escaped pirates, other than two Pirate ships (La Foudre Lussan and treasure under Moore), his support appeared [2] followed Cranby. Cranby's report is, as far as known, the first mention of a flag with the skull and crossed bones on a pirate ship: "a black flag with crossed bones, a skull and an hourglass" ("a sable ensign with cross bones, a death's head, and an hour glass").
very little online about this man,strange.