HENRY SINCLAIR of Sandwick lived in the reign of James VI.
From the M.S. description of Dunrossness, written by Mr. James Kay, minister of that parish, it is learned that in revenge for some insult done to his servant in the house of Brew, he, on the instigation of his wife, caused the man to kill Richard Leask, son-in-law to Oliver Sinclair of Brew, when he was about to enter Sandwick Church. Upon hearing of the murder, Henry Dillidasse, who was son-in-law to the said Richard, proceeded from Orkney, where he was living, to Caithness, and having gathered together some of his friends, proceeded with them to Zetland. They fell upon Henry Sinclair and his men, upon a moor between Laxfirth and Lerwick, and in the melee which ensued, Dillidasse shot the murderer with a pistol. Several men fell in the encounter, Henry escaping with difficulty, while one man, Sinclair of Burra, swam over to the Island of Trondra.
To this family the Island of Mousa once belonged.
In 1716, Robert Sinclair of Quendale, acquired from Henry Sinclair in Sandwick and his spouse, 231/2 merks land in Nether Levenwick and North and South Voe.