George Bouchier Worgan was probably born in 1757. He joined the Navy in 1775 and was appointed Surgeon on HMS Sirius in November 1786. Musically inclined, he brought his piano with him to the colony. Along with the crew of the Sirius, he left Australia to return to England in March 1791, arriving in April 1792. He had left his piano with Elizabeth Macarthur. 
His journal is an account of the first five months of settlement in New South Wales, attached to a letter written to his brother Richard Worgan. 
He married Mary Lawry, probably after his return from Australia, and they had two sons and a daughter. Both sons eventually migrated to Australia. Worgan died in March 1838, his death certificate says by apoplexy but there are other accounts which suggest suicide. (see Mollie Gillen, The founders of Australia; ADB)