Old Dealer/Publisher Information Required

I am doing some numismatic research at the moment and have come
across
a couple of handwritten letters on headed notepaper with the address
"Collectors Research Limited, PO Box 111, Montreal, Quebec". They
are
signed by someone called "John" and almost certainly date to around
the period 1965-1967. A quick Google search only brings up the fact
that they published at least one book during that period.

Could anybody with a long memory let me have a brief background to
Collectors Research and even hazard a guess as to who "John" might
be? His expertise centres around Middle Eastern coins.


Any help would be most appreciated.


Peter