The islanders were the subject of much anthropological and linguistic study around the end of the 19th and beginning of the 20th centuries and, thanks partly to outside encouragement, a number of books were written by islanders that record much of the islands' traditions and way of life. These include An tOileánach (The Islandman) by Tomás Ó Criomhthain, Peig by Peig Sayers and Fiche Blian ag Fás (Twenty Years a Growing) by Muiris Ó Súilleabháin.