Oronsay have yielded relics and organic remains precisely similar to those of Caisteal-nan-Gillean, one called Croch Sligach (shelly mound), and the other Croch Riach (grey mound).
These remarkable discoveries in the caves of Oban and shell-mounds of Oronsay were first described by Dr. Joseph Anderson and published in the Proceedings of the Society of Antiquaries of Scotland (Vols. XXIX and XXXII).
The Oronsay shell-mounds were explored by Mr. William Galloway some time before 1884, but the results were not published till Mr. Galloway's collection had been acquired by the Scottish National Museum of Antiquities, and thus came under the notice of Dr. Anderson.
Implements of bone and deer-horn of the blunt, chisel-ended type were found in a shell-heap on Inchkeith, and there can be no doubt that a careful search would result in the discovery of other primitive inhabited sites in North Britain yielding remains of the transition period. In Prehistoric Remains in Caithness, published in 1886 (Williams and Norgate), Mr. Samuel Laing, joint author with Professor Huxley, describes a number of shell-heaps which he assigned to "the earliest race of human inhabitants of Britain," and regarded their relics and associated fauna as contemporary with the Kjøkkenmøddings of Denmark.
Stray examples of the characteristic har-
