some Thom's 1914 details from the Law Directory/Customs section :
Dublin Port & Docks Board, Office - Westmoreland-street.
(members of the board, shipping members, clerks & officials....etc)
housekeeper, Edward Dowzard.
Custom House Docks & Warehouses Dept.
(manager, chief clerk, cashier etc..)
Police superintendent : E. Dowzard
If it's the Edward you are looking for it looks like he was attached to Customs & Excise and would seem to be the same Edward mentioned in the other posting with a residence at Newbridge Ave -
http://www.rootschat.com/links/0720/Shane