Hello again Alicia!
Have you tried the Boyle Library branch or the Anglican church in Boyle? Possibly one or the other might have some information. I also located the death records for Alexander and Elizabeth. See below.
Boyle Branch Library
King House, Boyle, F52 HN50
Senior Library Assistant: Matthew Gammon
Tel: (071) 9662800 E-mail:firstname.lastname@example.org
Tuesday: 1.00pm to 8.00pm
Wednesday: 10.00am to 1.00pm and 2.00pm to 5.00pm
Thursday: 1.00pm to 8.00pm
Friday: 10.00am to 1.00pm and 2.00pm to 5.00pm Saturday: 10.00am to 1.00pm and 2.00pm to 5.00pm
fourth record 1913 death record for Alexander
ninth record 1923 death record for Elizabeth