reported that had Lord Sutherland and Lord Reay not been in their way then the Sinclairs would have been among the first of the rebels, with about 500 Caithness Sinclairs who were ready to join the Jacobites, although the Earl of Caithness, their chief, supported the British Government. When Duncan Forbes, Lord Culloden was forming the 18 Independent Highland Companies to oppose the Jacobite rising of 1745 the Sinclairs were not offered a company. In 1750, Sir William Sinclair of Dunbeath founded the Baptist church at Keiss. Castles Castles that were either built by the Sinclairs or came into their possession have included amongst many others: Roslin Castle, also known as Rosslyn Castle in Midlothian, is considered the earliest seat of the Sinclairs in Scotland. The ruins show that it was once a large, strong, princely stronghold. The main tower is ruinous, but a range that dates from the sixteenth century is almost complete. The keep was probably built by Sir William Sinclair who set out on a crusade with Robert the Bruce and was killed fighting the Moors in Granada in 1330. Roslin Castle was sacked and torched in 1544 by the Earl of Hertford. In 1650 it was attacked again by George Monck, 1st Duke of Albemarle during Oliver Cromwell's invasion. The castle was damaged by a mob of Covenanters in 1688. The castle is now owned by the Sinclair-Erskine family. The Sinclairs also built the famed Rosslyn Chapel nearby. Castle Sinclair Girnigoe, near Wick, Caithness was once thought of as two castles: Castle Sinclair and Castle Girnigoe, however later theories are that it was one large fortress. There is not much left of the part that is known as Castle Sinclair, but the Castle Girnigoe part is a substantial ruin that rises five stories on a cliff above the sea. The castle was damaged by the Clan Campbell when it was attacked after the Battle of Altimarlech in 1681. The castle is now in the care of the Clan Sinclair Trust. Castle of Mey, north-east of Castletown, Caithness is a Z-plan tower house that rises six stories and dates from the sixteenth century. The castle was property of the Sinclair Earls of Caithness from 1566 and they built the castle. William Sinclair, son of George Sinclair of Mey, while a student at Edinburgh High School in 1595, shot and killed Bailie MacMorran in a siege at the