Hi Mark,
Yes I see what you mean.
I did find this on the National Archive website which gives some evidence that an element of the 46th Regiment at least was in Martinique in 1809:
Scope and content Martinique 1809:
Staff, Commissariat, Medical Department, Royal Engineers, Royal Artillery, 1st, 3rd, 4th, 8th West India Regiment, 7th, 8th, 13th, 15th, 23rd, 60th, 63rd, 90th, Regiments, Royal York Rangers, York Light Infantry Volunteers, Royal West India Rangers, Light Infantry attached to 4th West India Regiment, Grenadier Company, 25th Regiment, Grenadier Company 60th Regiment, Flank Company 46th Regiment
Covering dates 1809
Held by The National Archives, Kew
I noticed on wikipedia it does list engagement at Dominica 1808.
Ok I think I've got it check out this link
http://www.archive.org/details/histreco ... 00cannialaThis will allow you to read for free the book 'Historical record of the Forty-sixth, or the South Devonshire'
' The Forty six embarked from Cork arriving at Dominica June 1804 and were involved in repulsing a French invasion in February 1805'. I haven't read it all but it states that a Flank Company of the 46th Regiment took part in further engagements (backs up the infomation held at the National Archive).This suggests to me that only a small number of the 46th took part in the Campaign which is going to be a real pain to find out if your chap was part of the Flank Company.
Have you checked the National Archive for any pension records held for your chap?
Hope this helps.
Regards
Adrian