The Carlin Family Papers contain the correspondence of Sarah Carlin (nee Brooke) and her husband Frederick Benjamin Carlin, their daughter Ethel Maud 'Nettie' Darling and her daughter Mary 'Molly' Flewell-Smith. The papers were collected together by Oriel C. Morris, the daughter of Mary Flewell-Smith.
The earliest correspondence contained here are letters from friends and family received by Sarah Brooke before her marriage to Frederick Benjamin Carlin. The Carlins emigrated to South Australia in ca. 1849 and the correspondence contains letters written and received by them and from their families in England, including letters Sarah Carlin sent to her parents William and Dinah Brooke. The papers also contain letters received by the Carlins daughter Ethel Maud 'Nettie' Darling (nee Carlin). This includes letters from her husband Charles Alfred Darling and her daughter Mary Ethel Carlin 'Molly' Flewell-Smith (nee Darling) . There is also some genealogical material compiled by Oriel Morris (nee Flewell-Smith) tracing the Carlin (1792-1850) ; The papers also contain a couple of unidentified photographs, Masonic membership certificates from London as well as a facsimile issue of the 'London Post' from 1745.

Letters received by Sarah Carlin (nee Brooke) by friends, family and her husband Frederick Benjamin Carlin.

Letters written by Sarah Carlin from South Australia, primarily to members of her family in England, including her father William Brooke, her step(?)-mother Dinah Brooke and her brother William Brooke

Letters received by Frederick Benjamin Carlin, primarily from his family in England.

Letters written by Frederick Benjamin Carlin from Port Lincoln, South Australia, primarily to family members in England.

Letters received by Nettie Darling (nee Carlin) by friends and family. Includes letters by her mother Sarah Carlin, and her aunt Betsey Quinton 'Bettie' Carlin (1825-?)

Four certificates on vellum issued by the United Grand Lodge of Ancient Free and Accepted Masons of England and the Supreme Grand and Royal Chapter of Royal Arch Masons of England.

A genealogical chart of the Carlin family, a letter by Ben Carlin of Western Australia, dated 29 May 1974 to his distant cousin Valerie Binks in Sussex, England, about the Carlin family.