Hi With apologies, here is yet another contribution to the current flow of self-promotional messages. Trinity College Dublin's John Gabriel Byrne Computer Collection (https://hstmnetworkireland.org/the-john-gabriel-byrne-computer-science-colle... ) has just published this book about Percy Ludgate: Coghlan, B. and Randell, B. (eds.). Percy Ludgate (1883-1922): Ireland's First Computer Designer (Paperback). John Gabriel Byrne Computer Collection (2022), 246 pages. [ISBN 10: 1911566296 ISBN 13: 9781911566298] It is available from, for example, Book Depository International via AbeBooks (https://www.abebooks.com/servlet/BookDetailsPL?bi=31168337121&cm_sp=det-_-bsk-_-bd) Cheers Brian Randell — School of Computing, Newcastle University, 1 Science Square, Newcastle upon Tyne, NE4 5TG EMAIL = Brian.Randell@ncl.ac.uk PHONE = +44 191 208 7923 URL = http://www.ncl.ac.uk/computing/people/profile/brianrandell.html