After five years’ continuous service in Sierra Leone, he was promoted and posted to Hobart, Van Diemen's Land (Tasmania),[3] at that time Great Britain's convict settlement, where among other matters, he was particularly concerned about the cost of mining coal and of the inefficient coal mining operation.
British concerns at the perceived failure of the British commissariat and transport arrangements in the Crimea led to reviews of those of other nations, and Commissary General George Maclean examined the Austrian system, while a commission, under Major General Knollys, was sent to Paris to learn from the intendance.
[5] George Maclean was initially appointed in charge of the arrangements in Constantinople, and subsequently succeeded William Filder as Commissary-General commanding the Commissariat in the East during the latter part of the siege of Sevastopol, for which he was awarded the Medal and Clasp.
[8] Major-Gen. Henry John Maclean, eldest son by his second wife, was born at Nassau in 1827, and entered the army in 1845.
He took his medical diploma at Edinburgh in 1861 'On epidemic yellow fever[10]', married in 1863, (possibly a Miss Yapp).