Logan House, an old mansion in Penicuik parish, Edinburghshire, on the left bank of Logan Burn, 5½ miles NW of the town. Its owner, Charles Cowan, Esq. (b. 1801), Liberal M.P. for Edinburgh 1847-59, holds 5677 acres in the shire, valued at £1816 per annum. See Glencorse.—Ord. Sur., sh. 32, 1857.

(F.H. Groome, Ordnance Gazetteer of Scotland (1882-4); © 2004 Gazetteer for Scotland)