Dalgarno Family Genealogy Forum
One more reference that ties in with the last-
Per 2000 Gazetteer for Scotland:
A small burgh created in 1664 under the name of NEW DALGARNO by the Earl of Queensberry, Thornhill is located on the River Nith 14 miles (22.5km) north of Dumfries. Notable structures include a monument to the explorer Joseph Thomson, a market cross (1714), the Buccleuch and Queensberry Hotel (1855, by Charles Howitt, on the site of Robert Burns' cobbler's shop), Thornhill Hospital (1900), and four churches built in the 18th and 19th centuries.
Nearby are Drumlanrig Castle, Morton Castle, and, at Nith Bridge, a 10th-century cross-shaft with carved panels.