Thanks. Yes I found the entry and it was the 'pres. by George III' bit I wasn't sure about. Presented by the King to whom? the new parish? and why twice? So your explanation is very helpful - thank you!
What does trans and adm. mean? Isaac was minister at Sorbie for many years but it doesn't say that in his entry so am assuming he went to Sorbie in 1775 (from Ratcliffe-Highway) and then moved to Whithorn in 1794.
Here's the entry:
ISAAC DAVIDSON, D.D.; min. at Ratcliffe-Highway, London; pres. by George III. 12th April 1775; adm. 2nd Nov. following; trans, to Whitern 19th June 1794: pres. by George III., trans, and adm. 19th June 1794; died 26th Dec. 1810. He marr. 11th May 1764, Elizabeth, daugh. of Gideon Elliot of Harwood, and had issue an only son, Elliot William, min. of Sorbie.