On the 10th I went to the Causeway, had many more stones raised in the morning and in the afternoon put aboard a sloop I freighted for Dublin, to be filled with coals at Ballycastle; came off very late called at Mr. Duncan after ten and lay there. Having viewed and examined this wonderful work of nature, the Giant's Causeway, with as much exactness as I could, and made on it some observations: which I sent to the Royal Society and they did me the honour to print them in the Philosophical Transactions of the year 1753.34
On the 10th I returned to Ballimagarry and set out for Coleraine, and observed the pillars of stone at Cross Reagh within 2 miles of Coleraine: I came to that town which is pleasantly situated on a rising ground to the east of the river Bann, which here divides the County of Antrim from the County of Londonderry. This town has large liberties being an Estate with other lands especially Derry that was forfeited by the rebellion of the O'Kanes in the time of Queen Elizabeth, and was granted by King James the First to the twelve Companies of London, who divided most of the lands between 'em, but some are in common and particularly the salmon fishery. Out of each of twelve Companies two persons are chose, which make what they call in London the Irish Society, for the management of these estates; and most of them are lett at a low rent, and purchased according to the improved value: There is a little town on the other side, which is the parish of Killowen. There is a handsome town house in Coleraine built by the Society; and they have a great market every Saturday for Linnen and yarn which is the chief support of the place. I rode a mile below Coleraine to see the salmon fishery which is very great; they catch 'em with what I think is called a seine-net, that goes across the river, and
Over this is a pleasant situation, the house of Mr. Richardson a member of Parliament, who married Sir John Eyles daughter and purchased of the Society that Estate, opposite to it is a pretty Mount call'd Mount Sandal, which seemed to be monumental.