David Herd "The Ancient and Modern Scots Songs Heroic Ballads etc" pub 1776 says......
"The following song was made upon Mess David Williamson on his getting with child the Lady Cherrytree's daughter, while the soldiers were searching the house to apprehend him for a rebel"
......unfortunately he fails to mention any physical abnormalities....

It was in and through the windows broads
And all the tirliewirlies* o'd;
The sweetest kiss that e'er I got
Was from my Dainty Davie

* ain't that a wonderful word?