Revusical.
It is possible that this revusical is the same as, or has been adapted from, another Nat Phillips' production, The Sanatorium (1919). Both works appear to be set in an asylum and to involve similar characters.
The first-known production of Have a Bath, Sir! was during the second week of the 1927 Stiffy and Mo reunion in Brisbane. The Brisbane Courier reports on the occasion that 'So great is their popularity that once again many had to be turned away, the house having been full long before 8 o'clock... There was a healthy mixture of nonsense in Have a Bath, Sir which was billed as 'a musical comedy revuette,' in which Dr Dapper (Dan Weldon), the matron (Dorothy Manning), Dr Mo (Roy Rene), Stiffy (Nat Phillips), the lunatic who wheels his barrow upside down for fear someone might put bricks in it (Jack Kellaway), Miss Monotony (Polly Power), Mr Nearly Better (Hal Cooper), and the neurotic patients (the Charleston Boys) appeared at their best' (28 February 1927, p.16).
1927: Empire Theatre, Brisbane, 16 February - 4 March.