some details of possible siblings to Catherine from extracted records on familysearch :
John Campbell, 26 Feb 1864, 0363, Aughadowey, Londonderry
Mary Jane Campbell, 06 Oct 1867, 452, Aughadowey, Derry
Charles Campbell, 01 Jul 1869, Londonderry
Thomas Edward Campbell, 03 Jun 1871, 524 Aughadowey, Derry
Grace Campbell, 13 Feb 1873
Rose Campbell, 10 Feb 1877, Macosquin, Londonderry
Bridget Campbell, 29 Jul 1878, Macosquin, Londonderry
Parents : Thomas Campbell & Jane Templeton
Shane