Detholiad o Morris, L., 1748. Plans of Harbours, Bars, Bays and Roads in St. George's Channel. Mae'r detholiad (tudalen 40) yn disgrifio pysgodfa cregyn gleision perlog yng Nghonwy.
Mae'r detholiad yn darllen fel a ganlyn: “The Place was famous some Time ago for Pearl-fishing; but now is much neglected, as it is upon all this Coast, where the Pearl Muscle is found in great Plenty”