Richard! You blew me away! I will try your suggestions, but I am an old geezer with a classical guitar and don't think I could have managed those chords in my best of days.
Following Amos' input I have come up with the following, and would appreciate any suggestions.
Am E Am
There were three brothers in merry Scotland
Am Dm E7
In Scotland there lived brothers three
Am C (?) Am Dm
And they did cast lots which of them should go should go
E7
should go
C Dm Am
For to turn robber all on the salt sea
Do you think that that might work?
Thanks again .... Edmund