Saunders Newsletter 2nd January 1822
So, now you know as much about the Bruckless lighthouse as I do. Bruckless lies at the head of the bay prior to Killybegs, as per the map below. The lighthouse that is shown adjacent to Carntullagh Head is Rotten Island, a misnomer if ever there was one, which was established in 1838, sixteen years before Nesbitt's long-forgotten aid to navigation. In the second, close-up map of Bruckless Bay from that period, there is no sign of the lighthouse, indicating it must have been quite shortlived.
Bruckless Bay 1st edition OS map. Bruckless is at the head of the bay. Darney Point, where the lighthouse was, is near the bottom at the nearest point on the mainland to Flat Rock. A light here would not only serve to warn boats of the dangers of the nearby rocks but would also enable them to continue fishing at night without having to regain Bruckless before it got dark. As such, Mr. Nesbitt's selfless gesture would probably reap dividends through the increase in catches.
As for the lighthouse on Darney Point, it seems - according to a post on the Belong to Bruckless Facebook page - that nobody in the community has ever heard of it and in fact one poster denies vehemently that it ever existed. To my mind, it must have been a substantial structure, possibly a wooden hut, with candles burning through a window, though I doubt it was a permanent structure of stone or iron. If it were merely a pillar with a lantern hung around it, I doubt it would have been worth a mention in de paper.