Mrs PickyBoo here :-)
That 1948 story actually says Teddy wasn't Robert Beasley's dog
"The owner of the dog, Mr Robert Beasley, has now received a letter from a writer in San Diego, California, saying he saw the story and would like any news of other unusual dogs in England.
The writer, Mr Glad Thompson, enclosed a dollar bill to pay for a photo of Mr Beasley's dog.
Following this letter, Mr Herbert Beill, junior, Salmon Hotel, Berwick, is to write to Mr Thompson telling him of another unusual dog, Teddy, who hates Russians and understands two languages."
So Teddy was another dog, not the one owned by Robert Beasley?
But I have no doubt that both dogs were clever :-)
Boo