"Natural rock bridge"? Madman's Window in Antrim!

Didn't know if this one might be too much of a toughie (technical term) but we wanted to know where this gentleman was sitting.....And robinparkes ( 13073434@N03/ ) supplied the answer - Madman's Window at Glenarm in Co. Antrim!..Date: 1860-1883..NLI Ref: STP_0399 ( vtls000563715 ) . .You can also view this image, and many thousands of others, on the NLI’s catalogue at catalogue.nli.ie ( http://catalogue.nli.ie )