The new reign had scarcely begun when trouble arose between King Charles and his Scottish subjects. On the one hand, he alienated the nobles by an attempt, partially successful, to secure for the Church some of its ancient revenues. More serious still was his endeavour to bring the Scottish Church into uniformity with the usage of the Church of England. James had understood that any further attempt to alter the service or constitution of the Church of Scotland would infallibly lead to serious trouble. He had given up an intention of introducing a new prayer-book to supersede the "Book of Common Order", known as "Knox's Liturgy", which was employed in the Church, though not to the exclusion of extemporary prayers. When Charles came to Edinburgh to be crowned, in 1633, he made a further attempt in this direction, and, although he had to postpone the introduction of this particular change, he left a most uneasy feeling, not only among the Presbyterians, but also among the bishops themselves. An altar was erected in Holyrood Chapel, and behind it was a crucifix, before which the clergy made genuflexions. He erected Edinburgh into a bishopric, with the Collegiate Church of St. Giles for a cathedral, and the Bishops of Edinburgh, as they followed in rapid succession, gained the reputation of innovators and supporters of Laud and the English. Even more dangerous in its effect was a general order for the clergy to wear surplices. It was widely disobeyed, but it created very great alarm.