In 1600 he was put on the standing commission of the church, in 1601 appointed one of the royal
chaplains, in 1605 titular
bishop of Orkney, and in 1608
moderator of the general assembly. He preached before the
Glasgow assembly of 1610 in defence of
episcopacy. Law, along with
John Spottiswoode,
David Lindsay, and
Peter Blackburn, received some of James VI's episcopal appointments. Law became a nemesis to the Stewart earls who built for themselves a reputation as tyrants. He supported the cause of the people of Orkney against the oppression of
Patrick Stewart,
Earl of Orkney, and succeeded in getting the lands and jurisdiction of the
bishopric separated from those of the
earldom. He strengthened the rights and financial security of the bishopric of Orkney, and during his episcopate
Scots Law replaced the earlier
Norse Law for most purposes. Law relied on the support of a circle of influential merchant-lairds who were associated with local landed families. Towards the end of his Orkney tenure, Bishop Law had an important role in the aftermath of the 1614 rebellion of Robert, the son of
Patrick Stewart, 2nd Earl of Orkney. Government forces suppressing the rebellion had besieged
Kirkwall Castle and utterly demolished it at the order of the
Privy Council of Scotland. A similar fate was intended for the
St. Magnus Cathedral, in which rebels had hidden. The intervention of the Bishop prevented that from happening, saving the Cathedral - considered a fine example of
Romanesque architecture. Law is also said to have succeeded in persuading Stewart to surrender his father's houses. == Archbishop of Glasgow ==