Mahala Ball was born to Jacob Ball and Jane (Edwards) Ball and christened on 12 October 1856 in Chivelstone, Devon, England.  Following local tradition, she was named after a previous sister, Mahala Edwards Ball, who died aged 6 months. The second Mahala appears on the 1861 census age 4, living with her parents in East Portlemouth, Devon.
On 4 September 1873, Mahala married John Brooking in Diptford, Devon.  There is a query about the children they had: John in 1874, then no children until baby Mahala in 1891. Although her birth record states that her mother's maiden name was Ball, she is quite a late baby; brother John would have been 16 or 17. Father John appears in each subsequent census, so he was not away.
A death in 1929 is recorded for a Mahala Brooking, age 73, so the age would be round about right - but the death is recorded in the Farnham registration district in Surrey, Sussex, and Hampshire. If this is her - what was she doing there? 
↑ Parish baptismal register (Chivelstone) via our4bears.net
↑ "England and Wales Census, 1861," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M7TD-89H : 11 December 2017), Mahala Ball in household of Jacob Ball, East Portlemouth, Devonshire, England; from "1861 England, Scotland and Wales census," database and images, findmypast (http://www.findmypast.com : n.d.); citing PRO RG 9, The National Archives, Kew, Surrey.
It may be possible to confirm family relationships with Mahala by comparing test results with other carriers of her mitochondrial DNA.
However, there are no known mtDNA test-takers in her direct maternal line.
It is likely that these autosomal DNA test-takers will share DNA with Mahala: