The Theatre CAT (1986), by Maureen Potter.

The Theatre CAT (1986), by Maureen Potter. A gorgeous vintage children's book. 

This delightfully illustrated children's book follows Tommy, a theatre cat who leads an adventurous and humorous life, both onstage and behind the scenes. Along the way, he encounters a host of comical scenarios—from challenging the cleaning lady to meeting a human-sized cat—before ultimately winning over actor friends at the theatre

Maureen Potter appears through the book, as the 'small lady with glasses' who sometimes gets annoyed with people, but is mostly smiley and friendly. 

MAUREEN POTTER, one of Ireland's best-loved stars, and known to many as the Queen of Comedy, died in April 2004, aged 79. She had a lifelong relationship with the Gaiety Theatre, beginning in 1939, and she is best remembered for her comedy in numerous pantomimes and variety shows.