The list of members of the Royal Dublin Society describes Joseph Verschoyle, M.A., as follows: ‘Archdeacon of Achonry, Killala, Co. Mayo, [he] was elected a member of the Dublin Society on 2 March 1815. In 1813 he married his cousin Frances, daughter of James Verschoyle, bishop of Killala. Interested in geology, he donated minerals to the Dublin Society’s museum on 25 January 1821, and attended the British Association for the Advancement of Science conference in Dublin in 1835. He was a council member of the Geological Society of Dublin. Later archdeacon of Tuam, the R.D.S. recorded his address as Ballymote, Co. Sligo. He died in 1862.’ His interest in geology was mainly focused on the Mayo-Sligo region, most notably on dykes. One of his papers was accompanied by a geological map of this area, Northern Coast of Mayo and Sligo, and woodcuts. He was also the inventor of a device, which he called an ‘orthoscope’, for determining straight lines in the field; he communicated this, with drawings, to the Geological Society of Dublin in 1834 or early 1835. In Sketches in Erris and Tirawly, Caesar Otway mentions that Archdeacon Verschoyle contributed some of the drawings from which the woodcuts in the volume were made, but the only one which he specifically identifies is the view of Moista Sound.
The Royal Dublin Society, at http://www.rds.ie/cat_historic_member_detail.jsp itemID=1099032&item_name=, ‘Joseph Verschoyle’. Accessed 10.06.2013.
Paul Mohr, ‘Archdeacon Verschoyle and the geology of Cos. Mayo and Sligo’, Irish Naturalists' Journal, 22:11 (1988), 497.
Landed Estates Database, Moore Institute, NUI Galway, at landedestates.nuigalway.ie/LandedEstates/jsp/index.jsp, Family Verschoyle. Accessed 24.11.2014.