Seventeenth-century efforts to salvage the treasure are well-documented. The Duke of Lennox gifted rights to Spanish wrecks near Tobermory to the Marquess of Argyll. In 1666 his son the Earl of Argyll engaged James Maule of Melgum to use diving bells to find treasure, and recover the valuable brass cannon. Maule had learnt diving in Sweden, but raised only two brass guns and an iron cannon, and left after three months. It was later said he had hoped to return, thinking he was the only expert diver. Argyll however raised six cannon by workmen under his direction, and next employed John Saint Clare, or Sinclair, son of the minister of Ormiston, in 1676 and a German sub-contractor Hans Albricht van Treileben, who had worked on the wreck of the "Vasa". Next year, the earl transferred the rights to Captain Adolpho E. Smith and Treileben. At this period the fore-part of the wreck was visible above water, and was called the "Admiral of Florence". The project was beset with difficulties in 1678; the Admiralty disputed Argyll's rights to the wreck. Captain Adolpho Smith refused to return the diving equipment to William Campbell, captain of the earl's frigate, the "Anna of Argyll". The McLean clan fought the divers on land at Tobermory, led by Hector McLean, brother of Lachlan McLean of Torloisk.