Hi
I saw your request re George Briggs and Ellen McManus, so I decided to see if I could find any information for you when I was in the State Library a few days ago. The following is what I did find:-
ARRIVAL FROM OVERSEAS.
Ellen McManus, single, aged 22 years and Mary, single 24 years, and Henry, single 28 years all arrived in South Australia 14th August 1850 aboard the "British Empire"
MARRIAGE
George Briggs aged 25 years, marital status not recorded, son of John Briggs married 23rd Novemebr 1857 to Ellen aged 21 years, marital status not recorded daughter of Thomas McManus at Catholic Chapel, Mintaro, District Clare reference book 32 page 375
CHILD BORN TO GEORGE BRIGGS & ELLEN McMANUS.
1. Rose Ann born 5th Setpember 1858at Mintaro, District Gilbert reference book 14 page 419
MARRIAGE
George Gullidge aged 30 years, widower, father's name not recorded, married 12th July 1852 to Rose Ann Briggs, aged 15 years, single, father's name not recorded at St. Mark Church, Penwortham, District Adelaide reference book 10 page 429
CHILD BORN TO GEORGE GULLIDGE & ROSE ANN BRIGGS.
Selina Ann born 1st April 1854 place of bith not recorded, District Adelaide referenc ebook 4 page 304
Hoping the above is of some help.
Regards
"Twinkleberry"