George Philips Alexander Sinclair, 15th Earl of Caithness (30 November 1858 – 25 May 1889[1]), was a Scottish hereditary peer.
[3] On 28 March 1881 he succeeded his father as 15th Earl of Caithness and 2nd Baron Barrogill.
He died following an epileptic seizure at the Palace Hotel in Edinburgh in May 1889 at the age of 30.
By his will, he bequeathed the Castle of Mey and its lands and estates out of the hands of the Sinclairs, leaving the future Earls of Caithness without a family seat.
Instead, he left it to his friend, the zoologist Frederick Granville Heathcote on the condition that he legally took the name of Sinclair (which he did) and that he lived in the Castle for at least 3 months of each year (which he also did).