M. F. Mansfield, Romantic Ireland; volume 2/2
“ Just off the Giant’s Causeway is Rathlin Island, between which and the Mull of Cantyre on the Scottish coast all the Clyde-bound ships feel their way and the traveller by sea knows that he is well in toward the Firth of Clyde. Rathlin Island may naturally enough be presumed to be of the same strata of rocky formation of which the Causeway is built, practically a link which once may have bound Ireland and Scotland. ”
