13 May 2020 by engagement Crown on letter M on ? plinth Watermark: Crown on letter M on ? plinth Measurements: 40mm x 20mm (approx.) between chain-lines 2 and 3 Process: Canon EOS, backlighting; Photoshop Source: Tiomna Nuadh ar dTighearna (Dublin 1602) f. 119 Repository: Royal Irish Academy, Dublin