This comes from replying on the walk to my car! I fail to think things through. Stupid!
However, anyone reading the ship's muster will have noticed a Samuel Honey, too. I've had rather more luck here. He was born around 1823 according to the ship's muster, so I started there.
In this time period, we have births for various Samuel Honeys in Kilkhampton (1819), Prescot (1818), Norfolk (1826) and Devenport (1822). I thought this was the best one to go with due to the Devonport connection of the other Mr. Honey. The baptism of this "Samuel Pope Honey" took place in December 1822 in Devenport and was nonconformist. His parents were a William and Elizabeth Honey, and his apparent sister was Elizabeth, who was born in April 1818 and baptised that August at Morrice St. Wesleyan Church in Devenport.
An 1841 census shows William ("a stone...something") and Elizabeth, both aged 40 at 13 Wellington Street in Devenport. An Ellen...Santhly? aged 3 also resides there.
At the time the census was taken, Samuel can be located at the Seaman's Hospital Ship Dreadnought, docked at Greenwich. He was a "P. Ableman" according to the census. He would be dead in a foreign continent by the time of the next census.
I suppose the question I'm looking to answer is whether Samuel's father was Thomas and John's brother or not? There were two brothers - Hartnells - serving on Franklin's ships, and it would be interesting to find another familial connection among the men. Could Thomas and Samuel have been Uncle and Nephew?