An eminent physicist at St. Andrews University in Scotland, Sir David Brewster was among Talbot's scientific correspondents and one of the first to receive reports and samples of the new art. By 1841 Brewster and his colleague John Adamson, curator of the College Museum and professor of chemistry, were experimenting with the calotype process; the following year, in response to Talbot's hope that someone in Scotland might be persuaded to practice his process as a competitor to professional daguerreotypists, they instructed Adamson's younger brother, Robert, in the techniques of paper photography. Just weeks after the twenty-one-year-old Adamson had established himself as Edinburgh's first professional calotypist in May 1843, Brewster saw an opportunity to send business his way as the locally prominent painter D. O. Hill prepared to paint a large historical canvas commemorating the recent establishment of the Free Church of Scotland. "I got hold of the artist," Brewster wrote to Talbot, "showed him the Calotype, & the eminent advantage he might derive from it in getting likenesses of all the principal characters before they were dispersed to their respective homes. He was at first incredulous, but went to Mr. Adamson, and arranged with him preliminaries for getting all the necessary portraits." Within weeks Hill was completely won over, and the two were working seamlessly in partnership.