COLONSAY-AND-ORONSIY, islands (two), in the parish of Jura, district of Islay, county of Argyll, 15 miles (N. N. W.) from Portaskaig; containing about 840 inhabitants. These islands, which are situated in the Atlantic Ocean, about twenty miles to the west of the isle of Jura, are supposed to have derived their names from St. Columba and St. Oran, respectively. The former saint is said to have founded a monastery for Culdees, prior to his settlement at lona; and a priory of canons regular was founded by one of the Lords of the Isles, as a cell to the abbey of Holyrood. The islands are separated from each other only by a firth, in some parts scarcely a hundred yards wide, and which, being dry at the reflux of the tide, gives them the appearance of one continuous island. Together they are about twelve miles in length, varying from one mile to nearly four miles in breadth, and comprising about 11,300 acres, of which one-third is arable and meadow, and the remainder hill pasture, moorland, and moss. The soil is various, and has been much improved by the proprietor, who has also reclaimed considerable tracts of unprofitable heath and moor, and introduced the best system of husbandry. The chief crops are potatoes and barley, of which large quantities are sent to Islay for the distilleries, and to Ireland. Great numbers of blackcattle and sheep are reared on the pastures, and from the attention paid to the improvement of the breed, they obtain a high price in the markets of Doune and Dumbarton, to which they are mostly sent. The plantations consist principally of elm, ash, sycamore, and alder. The house of Killoran, situated in Colonsay, was built in 1722, on the site of the ancient Culdee establishment; it is a spacious mansion, to which two wings have since been added. At Oronsay a handsome residence was built in 1772. There is no village. Kelp is still manufactured here, affording employment to about 100 persons during the summer, and the produce being sent to Liverpool. There are several fishing-stations on the coast, but they are so exposed to the swell of the Atlantic that comparatively little benefit is derived from them; the fish taken are cod, haddock, ling, skate, turbot, flounders, eels, and lobsters of large size and excellent quality. The harbour of Portnafeamin affords secure shelter, and a substantial quay has been erected by the proprietor, near which is a good inn. There is« church, built by the heritors in 1802, a neat structure containing 400 sittings. The minister, who is appoimed by the incumbent of Jura, has a stipend of £50, and a house and garden, with some land given by the proprietor of Colonsay. A parochial school for teaching English and Gaelic exists here; the master has a salary of £1 1. 2., with £1. 10. fees. There is also a school upon the establishment of the Society for Propagating Christian Knowledge; the teacher receives a salary of £15, and £3 fees, with accommodation from the proprietor. Some portions remain of the ancient priory of Oronsay, situated close to the mansionhouse, and forming a venerable feature in a scene of wild beauty. The ruins are by far the most interesting in the West Highlands, with the exception only of those of lona; they consist chiefly of the church, in which are still preserved the tombs of the ancient Lords, with a portion of the cloisters and conventual buildings, and an ancient cross with an inscription, of which the words Here est Crux Colini Prior. Orisoi are still legible. There are also the ruins of a castle on an island in a lake near Colonsay House, which is supposed to have been a stronghold, or place of retreat in times of danger. Sir John M'Neill, G. C. B., late envoy extraordinary and minister plenipotentiary to the court of Persia; and Duncan M'Neill, Esq., late lord-advocate for Scotland, were born in Colonsaj-, sons of John M'Neill, Esq., proprietor of the tvi'o islands.