On the 1968 and 1972 Voter's lists Gladys and Robert are living at 17 Harwick Cres Grenville Carlton.
On the 1974 Voter's list they are living at 17 Croissant Harwick Cres which appears to be the same address including the same neighbours.
This appears to be Robert noted on the Phone and Address Directories.
Canadian Phone and Address Directories, 1995-2002 about R W Darrell
Name: R W Darrell
Street Address: 17 Harwick Cres
Postal Code: K2h 6r3
Phone Number: 613 828 4688
Years at Residence: 1995 1996 1997 1998 1999 2000 2001 2002
Check the URL below. I think this might be an obituary for Gladys and answers the question if they had children.http://www.legacy.com/obituaries/ottawacitizen/obituary.aspx...