Pedigree Query

No info on sire or dam, only a couple of photos with "Grandson of Carbine" written below - which I would post if I could figure out how....

They could not be brought back to Australia because of quarantine requirements, also I guess the cost.

My family is planning to sponsor a race next year at the Alexandra Picnic races in honour of "Iniskillen"(also spelt "Inneskillen"). Iniskillen was my grandfather's charger that he rode all through the dessert campaigns during the first world war. I am trying to track his genealogy - I have several ...