HERON family trees exist in volumes 23p1 Greenfield,[not sure if Greenfield is a surname or place name], vol 25,vol29, vol31, vol42(Transcribed to somewhere else), vol45, vol75, vol86 inc a Reid line
These family trees appear in the Blackwood Family history manuscript trees in the LinenHall library, Belfast. However the collection is based really on Co Down, so it could be a wild goosechase. Perhaps a local Heron could visit for you. If not then I suggest you ask them for photocopying estimates if they think your knowledge relevant and you should be prepared to pay a fee for copying, post and packing, and perhaps some staff time and overheads. However if the material is really relevant when you get it, I suggest a further donation to this unique library.
Linen Hall Library,17 Donegall Square North, Belfast BT15GB, Northern Ireland, Telephone: +44 (0)28 9032 1707, Fax: +44 (0)28 9043 8586, Email: <irish.reference[at]linenhall.com>.replace the [AT] with the symbol please
Finally from memory, there is a new major list of soldiers just available on Findmypast from waterloo to boer wars etc
good luck, jim