Hi!
I was very amused to find the following page on "Timbre Creating Compound Stops" in one of the authoritative texts of the 1920s or 30s . . . who's name will not be unfamiliar to lovers of the Cinema Organ . . .
"Of dual stops so composed we are able to give existing examples which have been skillfully devised and constructed by a noted expert. . . . That they have so long been neglected is far from being creditable to those who have claimed to have the tonal development of the Organ at heart. Expense may be urged as an excuse; but it is hardly a valid one in this day of monster Organs, comprising between two and three hundred speaking stops. "
(http://www.organmatters.co.uk/102.jpg)
One hopes that Hope Jones can be named now with impunity?
Best wishes
David P