Hi Martin,
I don't think the ITMA have a copy of Leo Maguire songbook. However, if you go the the National Library you will find a copy called "Songs with Words and Music by Leo Maguire. Here is the list of contents:
Table of Contents:
Aboard a whaler.
Avourneen O.
Between me and you (rockabye baby)
The big fellow (Michael Collins)
Bold Jack Donohue.
By the light of the moon.
Come to the céilí.
Dan Dooley.
Dawn over Dublin bay.
Deeper deeper.
Dreamy Shannon river.
The drums are out.
Dublin saunter.
The farmers boy.
The floor at Balnarinka.
Home to Tyrone.
Ireland to John Fitzgerald Kennedy.
Irish Molly O.
The Irish washerwoman.
An Irish yodel.
Kilcock.
Lake of Coolfin.
MacCarthy.
The man me mother married.
My colleen from Ballinasloe.
Ould Killarney hat.
Over the mountain track.
Patsy Dargan.
Pretty Polly.
Pretty Sal.
Reilly's gate.
Roger Casement.
Sing us a song of the old land.
Slán agus beannacht.
A song from the green fields of Erin.
Strolling guitar.
The twilight waltz.
What part of old Ireland do you come from?
The whistling gypsy.
You needn't be nervous of Nolan.
The book has long been out of print,