Both of their baptism records include a cross-reference note of their marriage, 9 May 1925, in the church of Blessed Virgin Mary of Mount Carmel in Liverpool
Here is familysearch's index reference to their civil marriage record:
England and Wales Marriage Registration Index, 1837-2005
Wilfred H O'Rourke
Marriage Registration
Apr-May-Jun 1925
Registration District: Liverpool, Lancashire
Spouse Name: Mcevoy
Volume: 8B
Page: 463
Line Number: 74
"England and Wales Marriage Registration Index, 1837-2005," , FamilySearch (https://familysearch.org/ark:/61903/1:1:QVZR-31RG : accessed 13 August 2015), Wilfred H O'Rourke and null, 1925; from “England & Wales Marriages, 1837-2005,” database, findmypast (http://www.findmypast.com : 2012); citing Marriage Registration, Liverpool, Lancashire, England, General Register Office, Southport, England.