Just building on some of the findings of ciderdrinker, here is a more complete listing regarding the births (and some early deaths) of children. Martha you have.
To John BLACK and Jane RUSSELL
BLACK, John
Parents John and Jane RUSSEL(sic)
1861.
Myer's Flat
Reg 7305.
BLACK, Margaret Ann
Parents John and Jane RUSSELL
1863
Nerr
Reg.9824
BLACK, William
Parents John and Jane RUSSELL
1865
Eagl
Reg 21831
BLACK, Elizabeth
Parents John and Jane RUSSELL
1867
Eagl
Reg 14620
BLACK, Agnes
Parents John and Jane RUSSELL
1872
Eagl.
Reg 22871
BLACK, Ellen
Parents John and Jane RUSSELL
1876
Nerr
Reg. 2210
Deaths
BLACK, John
Parents John and Jane (No mother's surname listed)
Born Nerr.
Reg 7305
BLACK, Agnes
Aged 9 months
Parents John and Jane RUSSELL
Born Eagl
1873
Reg 3876
BLACK, Ellen
Aged 11 yrs
Parents John and Jane RUSSELL
Died at Eagl.
1887
Reg 6134
Burials at Eaglehawk Cemetery. All at location Mon H Grave 89
BLACK, Agnis (sic)
BLACK, Nellie
25/4/1887
BLACK Baby female
8/8/1878
BLACK, Jenny
22/5/1894
BLACK, John
4/01/1892
At Bendigo Cemetery. Location-Pres 1240
BLACK, John
11/7/1862
Sue