Since Mr Potiphar / Pottipher was a child before the era of free primary education and couldn't read or write, he was never able to provide an authorised spelling of his surname - church registers, census and visiting composers all give different versions. So I suppose every one is equally right - or equally wrong.

From his responses to Vaughan Williams, he seems to have been a very perceptive man, with a fine ear for a song.

Georgina