An excellent new book has been published by Irish Academic Press called 'The Post Office in Ireland: An Illustrated History' by Stephen Ferguson.
The book is beautifully bound and printed, with many fascinating photographs, including some from Waterford County Museum's archives, one of which shows the interior of Dungarvan Post Office with three of the staff in 1904, and another with a caption mentioning the Dungarvan postmaster, printer, and cyclist Edward Brenan showing two of the post office staff.
Available from all good retailers.