I found Tommy Jenkins, but it's a jig.........Google turned up NOTHING for Tommy Jackson's Hornpipe. Ususally, if it has been recorded, Google will turn that up, or a book that it is in. Sorry.

T:Tommy Jenkins. JC.220
M:6/8
L:1/8
Q:110
S:John Clare,Poet,Helpstone (1793-1864)
R:Jig
O:England220
A:Northamptonshire

Z:vmp.P. Headford
K:G
G/A/|Bcd dcB|cde ABc|Bcd GAB|AFD D2G/A/|
Bcd dcB|cde ABc|BAG FEF|G3G2:|
|:F/G/|A2A Adc|BGG G2F/G/|A2A Adc|B3GBd|
(ec).G (dB).G|(cA).F GBd|(ec).A (dB).G|(cA).GG2:|]