Liverpool in New South Wales is one of the oldest urban settlements in Australia, founded on November 7th, 1810 as an agricultural centre by Governor Lachlan Macquarie. He named it after Robert Banks Jenkinson, Earl of Liverpool, who was then the Secretary of State for the Colonies. Tjaart is born on September 25, 1856. So the age of ‘Tjaart’ and ‘George’ is the same. You can ask yourself the question how many ‘Alma’s’ there will be, coming fom Holland and going to Australia and die there in 1883 being 26 years of age. Further more, it can be expected, that he is going to live in an agricultural centre. The pronunciation of ‘Tjaart’ in the dialect of Groningen resembles the pronunciation of ‘George’ in Australia very much. That is why I presume, that ‘Tjaart’ and ‘George’ are one and the same.
AUSTRALIA The only thing known to me was that Tjaart Alma (1856-1883), son of Freerk Alma and Catharina Amsing, has emigrated to Australia. The death certificate below shows that a George Alma from Holland existed. George Alma passed away on the 17 th  of August 1883 of phthisis (tuberculosis) in Liverpool at the age of 26. He is buried next day.  
Liverpool near Sydney in Australia.
According to the death certificate, Tjaart came to Australia on board of the Chimborazo.
The Chimborazo (from ‘The Illustrated London News’ of February 21, 1880).