This is what Deryk Barker sent me privately.  (Forwarded with his
permission.  For more information on the Berne Convention and international
copyright, try clicking on www.britannica.com.)

Deryk wrote:

>Turns out I was recalling a note by the composer himself (the liner note
>to the 1962 LP issue of his Columbia SO Rite):
>
>In 1937 or 1938 I received a request from the Disney office in
>America for permission to use Le Sacre in a cartoon film. The
>request was accompanied by a gentle warning that if permission
>were withheld the music would be used anyway (Le Sacre, being
>"Russian" was not copyrighted in the United States), but as the
>owners of the film wished to show it abroad (i.e. in Berne
>Copyright countries) they offered me $5,000, a sum I was obliged
>to accept (though in fact., the 'percentages' of a dozen crapulous
>intermiediaries reduced it to $1,200).
>
>Perhaps it was the US which didn't subscribe to the Berne Convention
>before the war? Perhaps they just singled out "Russian" artists,
>whether Soviet or not. I don't know.

Jim