Advice on 1930-40's piano method

[NewAge]

I see the forum has been particularly quiet for a few weeks, so here's a question that may reboot a little action, and hopefully provide me with some information.
I took piano lessons as a youngster in the early 50's. The method I used was handed down to our young son in the 80's. With me for guidance he raced through it in less than a month, a task which took me at least twice as long. Over the years I've accumulated a fair collection of sheet music, but unfortunately just cannot find that original method. And not surprisingly, I can't recall it's name. I'd dearly like to find a copy.
I believe it was a little smaller than A4 size, and the front/rear cover was green in colour.
The first exercise started with middle C, played seven times accompanied by the words, "Mid-dle-C-Is-On-This-Line"; followed by D also played seven times accompanied by the words, "D-Is-This-One-Just-Next-Door"...etc.
Would this piano method ring a bell with any teachers, players, or collectors of piano material?
From the subject title I estimate it dates from the 30-40's, but may have been in print even earlier.
Hoping to jog someone's memory.......
Thanks in advance.

[Gill the Piano]

Does the name Cuthbert Harris ring a bell? Or Mrs Curwen? Walter Carroll (though I don't think it's him)? Hilda Blake? John Thompson? It doesn't mean anything to me, but it might to someone on the Learning/Teaching Piano bit; try there.

[NewAge]

Gill, thanks for your reply.
None of those names rang a bell unfortunately. I'm sure I'd recognise the actual name of the method and originator if I saw it.
As you suggest, I'll throw it open on the learning/teaching forum.
Thanks again.