DAVID COWLEY AND CATHERINE PRENDERGAST

I am so glad that I decided to start inputting family details onto the Australian Ancestry site, as a contact that I had lost touch with has sent me an email.
The lady is a distant cousin, and maybe between the two of us we can delve further into our Cowley family background.
Both of us have not been able to locate a marriage for David and Catherine - maybe David used another christian name; or else they never married!!

David was the son of JOHN COWLEY and JANE ROBERTS, who were born in Ireland and migrated to England. All of their children were born in England, and from the Census records I believe the children were:

Jane born abt 1858 Liverpool
Elizabeth born abt 1859 Chorlton
John born abt 1861 Liverpool
Catherine born abt 1864 Liverpool
Alfred Henry born abt 1868 Chorlton (this is my link)
David born 1 Jan 1871 6 Broughton Street Manchester - died 4 May 1897 2 Corinth Street Harpurhey
Matthew bjorn abt 1874 Manchester (my distant cousin's link).

I know that John Cowley married Mary LEYLAND 24 Aug 1884 at Christ Church, Bradford/Beswick Lancaster (Mary born abt 1864 and her father was William Leyland).

From the Census they had 3 children:

John W born abt 1885 Pendleton Manchester
Florence born abt 1888 Harpurhey Manchester
Helena born abt 1890 Harpurhey

Alfred Henry(my gt. grandfather) married Elizabeth Ann SHAWCROSS 16 august 1891 at St Edmunds Church, Newton Prestwich Manchester.

Their children were:

Alfred born 2 Jan 1893 Swinton Manchester (my paternal grandfather)
(Ann)Agnes born abt 1895 Manchester
James born 14 July 1899 92 Carisbrook Street Harpurhey.

Matthew Cowley married Maria Fielding (born abt 1875 Blackrod Lancashire)

The 1901 Census shows Matthew, Maria and daughter Elizabeth living at West Derby Lancashire. Elizabeth was 2 years old and Matthew's occupation is shown as Steam Engine Fitter. The family went to live in Montreal Canada, and I wonder if other children were born in Canada?