George and Catherine were married 24th May 1839 in St Francis church in Melbourne Australia, and, then on the 25th May 1839 in St James church. The witnesses to both of these marriages were William and Hannah COGAN. I have been told that this was a common practice if both parties were from different religions.
George and Catherine as far as I have found had the following children:
Richard GRAHAM B: 12th of July 1840 Melbourne baptised 19th July 1840 Roman Catholic church page number 137 Number 92 d:1920
William GRAHAM B: 1842 Melbourne Australia d:?
Isabella GRAHAM B: 1851 Kilmore Australia

Richard was a carrier, and bullock driver, he first went to Gippsland in 1860 and selected land on the Tambo River in 1867. He lived near his inlaws John MC ALLISTER and Janet Walker nee MCDOUGALL, in 1874 he added another 300 acres near Bruthen, in the angle between Buchan and Swan Reach here they ran a boarding house.

Richard GRAHAM M:2nd February 1867 in Sale Victoria Australia Mary Ann MC ALLISTER B: 1852 Bonhill Dunbarton Scotland.
They had 15 children:
Janet b: 1866 d: 1866
Mary b: 1867 d: 1874

Isabella b: 1870 M: 1893 John JEFFERS b: 1869
they had 4 children:
Mary Selinda JEFFERS b: 1894
Clarence John JEFFERS b: 1896
Daphne JEFFERS b: 1900
Lindsay Allan JEFFERS b: 1906

Catherine b: 1872 m: 1900 Edward POYNTON b:1867 d: 1907
They had 3 children
Mary POYNTON b: 1902
Edward Francis POYNTON b: 1903
Mary Netta POYNTON b: 1906

George b: 1873 d: 1922 M: 1897 Rose JEFFERS b: 1874
They had the following 11 children born in Orbost Victoria Australia
Kieth
Alvina Holly b: 1900
Norman George b: 1902
Rupert (Claude)b: 1904
Selinda Rose b: 1906
Mary Janet b: 1909
Dulcie May b: 1912
Harold Jonus b: 1914 d:1984
Dick
Percy
Frank

Richard b: 1875 d: 1918? m: 1905 Mary Hoath DAWSON (DOWSON)b: 1885
They had the following 4 children:
Richard James Dowson b: 1906 d: 1978
Thelma Vivian Marguerite b: 1907
Alfred Arther Rex b: 1909 d: 1970
Lyall Francis b: 1910 d: 1973

Agnes Ellen b: 1877 m: 1899 James ANGUS
They had the following 6 children:
James Arthur ANGUS b: 1901
Mary Ellen ANGUS b: 1904
Coral Myrtle ANGUS b: 1907
William Francis ANGUS b: 1910
Alan ANGUS
Jack ANGUS

Mary Margaret b: 1879 m: Thomas Morrison b: 1873 d: 1962
They had the following 4 children:
Thomas MORRISON b: 1900
Dorris MORRISON b: 1902 m: John DORAN
Peg MORRISON
Margaret MORRISON b: 1903

Elizabeth b: 1882 d: 1956 m: 1900 Joseph John Alfred MARSHALL
They had the following 6 children
Joseph Oliver MARSHALL b: 1901 d: 1908
Elsie Veronica MARSHALL b: 1902 d: 1978 m: 1931 David Botterial
MARSHALL ( son of William Henry MARSHALL and Elizabeth walker
nee DENNIS)

Mary Margaret MARSHALL b: 1904 d: 1964 m:1949 Herbert Francis
WINSON
Charles Richard MARSHALL b: 1906 d: 1982 m: 1936 Annie Constance
ENGLISH b: 1909

Thomas Alfred MARSHALL b: 1914
Felix Joseph MARSHALL b: 1919 d: 2007

Alexandria Ann b: 1884 d: 1952 m:1905 Alexander Hugh MORRISON son of William MORRISON and Margaret nee FRASER
They had 3 children
Alexander Francis MORRISON b:1906 m: 1933 Grace MARSHALL
Alan Graham MORRISON b: 1912 d: 1983
Arthur Victor MORRISON b: 1916

John William Peter b: 1886 d: 1971 m: Ellen Eliza Fraser
Duncan Earnest b: 1888 d: 1919
Harold Francis (Frank) b: 1890 d: 1942
Oliver Claud b: 1892 d: 1892
Arthur Victor b: 1893 d: 1970

I will continue, the dates so far are those I know, if any-body would like to make corrections or add dates or information I would love to hear from you.