Picked up fragments an old song book. No covers or any means of identifying what book title was. Pages look 1920s style but this is one of the songs in it. Can anybody suggest an air?

CROW SONG

There were three crows sat on a tree,
Oh Billy Magee Magar! Billy Magee!
There were three crows sat on a tree,
Oh Billy Magee Magar! Billy Magee!
There were three crows sat on a tree
And they were black as crows could be,
And they all flapped their wings and cried
Caw, Caw; Caw, Billy Magee Magar!
And they all flapped their wings and cried
Billy Magee Magar!

Said one old crow unto his mate,
Oh Billy Magee Magar! Billy Magee!
Said one old crow unto his mate,
Oh Billy Magee Magar! Billy Magee!
Said one old crow unto his mate,
"What shall we do for grub to ate?"
And they all flapped their wings and cried
Caw, Caw, Caw, Billy Magee Magar!
And they all flapped their wings and cried
Billy Magee Magar!

"There lies a horse on yonder plain,
Oh Billy Magee Magar! Billy Magee!
"There lies a horse on yonder plain,
Oh Billy Magee Magar! Billy Magee!
"There lies a horse on yonder plain,
Who's by some cruel butcher slain,"
And they all flapped their wings and cried
Caw, Caw, Caw, Billy Magee Magar!
And they all flapped their wings and cried
Billy Magee Magar!

"We'll perch ourselves on his backbone
Oh Billy Magee Magar! Billy Magee!
"We'll perch ourselves on his backbone
O'Billy Magee Magar! Billy Magee!
"We'll perch ourselves on his backbone
And pick his eyes out one bv one."
And they all flapped their wings and cried
Caw, Caw, Caw, Billy Magee Magar!
And they all flapped their wings and
cried Billy Magee Magar!