Hmmmm. Gene e-mailed me and told me we're not allowed to give up quite yet....In another thread, I found a collection of fragments of what might be the song:

from Guest,Lindsay
Roll along, covered wagon, roll along,
Roll along, covered wagon, roll along
(line forgotten)
Shooting bullets in the air,
Roll along, covered wagon, roll along.
from Jack E
Roll along covered wagon, roll along.
To the tune of your wheels I'll sing a song,
City girls they may be fine, but give me that girl of mine.
Roll along covered wagon roll along.

Jack E. says that "Roll Along Covered Wagon Roll Along" was a big hit of 1934. And Jack supplies a parody verse:

Will you come to Abyssinia, will you come?
Bring all your ammunition and a gun,
Mussolini will be there shooting peanuts in the air,
Will you come to Abyssinia, will you come?

Jack says, "Thh words quoted by Guest, Lindsay are interesting as they seem to have been compounded with a street version: in 1935 or 6 when Italy invaded Abyssinia we kids used to sing this version to the tune of Roll Along Covered Wagon."