I am of the John Bliss & Sarah Horner family line. We corresponded on this a while back and I still have found no information that links the Kirby family to my Bliss family.
The Thomas Bliss (brother to John Bliss listed above )and wife Louisa died in Bathurst with no children after their son Willian Henry Bliss died on the voyage on the Fairlie in 1848.
Good to see that you still have not given up.
Bathurst NSW Australia