During both periods the government in the Colony of New South Wales transferred convicts that had been brought to Australia on to the island.
Rough seas and the absence of good landing sites made it difficult to supply and sustain the colony.
By 1812 a new penal colony had been established at Hobart Town in Van Diemen's Land and it had received its first convicts from Britain.
[2] During the second period the penal colony was initially revived as a place of banishment for the worst convicts, those who had re-offended while in Australia.
The New South Wales Government State Archives & Records has a web page that lists vessels that shuttled to the Island and back.