The song mentioned in a few posts back TerryA250, is correctly called "JOHN MACRAW THE FATTEST MAN In the FORTY-TWA" written and composed by Harry Linn.
I have a copy of the original music sheet which features on the front cover a rather thin Scottish soldier.
There is no mention of Ashantee and the line in question is verse 3 ".... The enemy a' ran awa' When they saw the legs o' John Macraw".