Births to John BRIGGS and Ann CAMPBELL
BRIGGS Mary Ann
6 Jan 1858 Mintaro Gil 13/62
BRIGGS Elizabeth
5 Aug 1859 Wakefield Cla 15/489
BRIGGS Catharine
5 Oct 1860 Mintaro Cla 21/245
BRIGGS Thomasina
29 Jul 1862 Mintaro Cla 25/662
BRIGGS Anne Maria
27 Feb 1864 Bungaree Run Cla 30/286
BRIGGS John Manuel
27 Jul 1865-07-27 Anama Cla 37/125
BRIGGS James
6 Oct 1866 Mintaro Cla 48/175
BRIGGS Rose Ann
23 Oct 1868 Mintaro Cla 68/300
BRIGGS Rose Alice
19 Nov 1869 Mintaro Cla 78/262
BRIGGS Sarah Juliana
14 Jun 1871 Mintaro Cla 95/297
BRIGGS Selina May
12 Jun 1878 Mintaro Cla 202/362
Like you, I can't see any births with James as father in the SA records.
In SA pre1875 Catholic and Scottish births are often not registered. http://www.jaunay.com/newsletter/newsletter7.htmlPerhaps another parish records search is needed.
Will press on.
Cheers
Cando