I have the 1920s book that this was in, and notice a few wrong words in the version posted above (in particular the important soap is missing!).
Here's my book's version:
Broad is the Gate and wide the Path
That leads man to his daily bath;
But ere you spend the shining hour
With sponge and spray, with sluice and show'r -
With all that teaches you to dread
The bath as little as your bed -
Remember, wheresoe'er you be
To shut the door and turn the key !
I had a friend - my friend no more ! -
Who failed to bolt his bathroom door ;
A maiden aunt of his, one day,
Walked in, as half submerged he lay !
She did not notice nephew John,
And turned the boiling water on !
He had no time, or even scope,
To camouflage himself with soap,
But gave a yell, and flung aside
The sponge 'neath which he sought to hide !
It fell to earth I know not where !
He beat his breast in his despair,
And then, like Venus from the foam,
Sprang into view, and made for home !
His aunt fell fainting to the ground !
Alas! they never brought her round !
She died intestate in her prime,
The victim of another's crime;
And John can never quite forget
How, by a breach of etiquette,
He lost, at one fell swoop (or plunge)
His aunt, his honour and his sponge !