Lantern slide showing the entrance to Seefin Cairn Co. Wicklow. Originally labelled 'W4 89', the slide is titled Journal - Seefin - LXII. The name Thomas H Mason, 5 - 6 Dame St. Dublin, is written on the slide mount.
Lantern slide showing the entrance to the passage tomb at Newgrange, Co. Meath. Originally labelled '2M 97', the slide is titled Entrance to Newgrange. The name T. Mason, 5 Dame Street, Dublin is printed on the slide mount.
Lantern slide showing the entrance to the passage tomb at Newgrange, Co. Meath. Originally labelled '2M 96', the slide is titled Entrance Newgrange. The name T. Mason, 5 Dame Street, Dublin is printed on the slide mount.
Lantern slide of an entrance to a monument on Skellig Michael, an island off the coast of Co. Kerry. Originally labelled, 'K1 II 88' and titled 'Skelligs'. The island is located off the coast of the Iveragh peninsula.