Deputy Commissary General at St. Helena while Nspoleon was imprisoned there.

See:

http://johntyrrell.blogspot.co.uk/2010/05/napoleon...a-discovered-in.html

The Napoleon Memorabilia collected and created by him and retained by his descendants were the subject of a major auction in New Zealand in 2010.

Among other items discovered is Ibbetson's diary which covers the journey to St Helena on the Northumberland with Napoleon. There are also a number of playbills recording the amateur dramatics that took place on the island during the captivity. This article from the New Zealand Herald gives further information.

He entered the Commissariat Department of the Army in 1808, and served in the Peninsular War.He sailed to St Helena on the Northumberland with Napoleon, and was one of only four officers to remain there for the duration of the captivity. He took over the job of purveying goods to Longwood House after William Balcombe fell out with the Governor and returned to England. He seems to have got on well with Hudson Lowe. He has previously been reasonably well known for his sketches of Napoleon. He lived in the house at Hutts Gate ("Little Pasture") vacated by the Bertrand family when they moved to their newly built cottage at Longwood.

Subsequently Deputy Commissary General in Malta.

Also see:

http://www.telegraph.co.uk/news/worldnews/europe/f...-from-St-Helena.html

Also see:

http://www.lautresaintehelene.com/autre-sainte-helene-articles-ibbetson.html

and

http://www.bbc.co.uk/news/10458197