Robert Lloyd Praeger (25 August 1865 - 5 May 1953) was an Irish naturalist and historian. Of a Unitarian background, he was born in Holywood, County Down, and grew up in that town where he was educated, first in the school of the Rev McAlister and then at nearby Sullivan Upper School.[1] He worked in the National Library of Ireland in Dublin from 1893 to 1923. He co-founded and edited the Irish Naturalist, and wrote papers on the flora and geography of Ireland. He organised the Lambay Survey in 1905 and, from 1909 to 1922, the wider Clare Island Survey. He was an engineer by qualification, a librarian by profession and a naturalist by inclination. He became the first President of An Taisce, and of the Irish Mountaineering Club, [2] in 1948 and served as President of the Royal Irish Academy. He is buried in Deansgrange Cemetery, Dublin with his wife Hedwig. His younger sister Rosamund Praeger was a sculptor and botanic artist.