If William Clarke was a surveyor it would explain moving from Cavan to Dublin. Perhaps his marriage would have taken place in Cavan.
Anne Jane Clarke born 3 Aug.1878 Cavan, Cavan, Ireland, dau. of William Clarke & Elizabeth McKibben Hamilton.
http://www.census.nationalarchives.ie/pages/1911/Down/Ormeau/Euston_Street/211795/
Eveline Clarke born 1891 dublinhttps://civilrecords.irishgenealogy.ie/churchrecords/images/birth_returns/births_1891/02370/1884725.pdf
Haven't been on this site for years, but back again, and would welcome any information you have!