I've attempted to render that into ABC--I had to guess whether the interior tonics should go up or down. To generate a MIDI or PDF from it, or to transpose it to another key (I've used C for simplicity), feed it to the folkinfo.org ABC Converter.

X:1
T:Christmas Is Coming
M:4/4
Q:1/4=144
K:C
c2cc | A2AA | GAGF | E2
w: Christ-mas is com-ing, the goose is get-ting fat,
EF | G2CC | DDFF | E2D2 | C2
w: Won't you please put a pen-ny in the old man's hat.
GA | cccc | A2AA | GAGF | E2
w: If you have-n't got a pen-ny, a ha'-pen-ny will do,
EF | GGCC | DDFF | E2D2 | C4 ||
w: If you have-n't got a ha'-pen-ny then God bless you.

This tune sounds suspiciously like the first part of "In an English Country Garden". Is the rhythm supposed to be straight, like ECG, or a little syncopated, like a hornpipe? (If so, just add a line "R:hornpipe" to the header.)