Online family trees have Ann DYER nee REAY being mother to children born 1834 - 1849.
From the death notice, Mercury 8 Dec 1879, Ann is in her 76th year. You might wonder at Ann having her first child at age 31 years. It is possible that Ann has an earlier family?
Launceston Examiner 2 Apr 1853 p3
https://trove.nla.gov.au/newspaper/article/36268669?MARRIAGE. By special license, on the 19th ult., at Trinity Cathedral, by the Rev. J. G. MEDLAND, Thomas Stone KELLAWAY, Esq., to Catherine Sophia, eldest daughter of Mr. B. B. DYER of
Hobart Town.
VIC BDM death
10034/1911 KELLAWAY Cath Sophia
parents UKN UKN / DYER
Death died Melb E age 76
The Argus 12 Sep 1911 p1
https://trove.nla.gov.au/newspaper/article/11615517?KELLAWAY -On the fifth of September at Melbourne, Kate widow of the late T S KELLAWAY, formerly
of Sutton Park Gunderoo, NSW.
Queanbeyan Age 9 Jul 1887 p2 (bravery award)
https://trove.nla.gov.au/newspaper/article/30916585?......Hugh Moreton HOLT 6 years of Newcastle.....brother William 3 years....sister.....nephew of Mrs T S KELLAWAY of "Sutton Park"....
For the purpose of locating all children born to Ann REAY, and to Benjamin Bissell DYER, it would be useful to identify the DYER - HOLT connection suggested here.