Hi Em,
Like Merryderry I cannot find the marriage but of theid six children which I can find one, Sarah, was born on 23 Jul 1864 so Merryderry is probably correct. If Catholic they would not have been registered.
On a better note I did find a death in a Callander of Wills
Death Joseph Glass 12 Jul 1908
Will Probate 1912
Residence Eden Park Londonderry
Regards