Mary Starfire & Bingo :which pieces did they appear in?

[George]

In which short story did Mary Starfire appear? She was a young American woman working in a bookstore and living in England.She travelled around by bicycle and tookr revenge on a ne'er do well who she mistook to be her lover.

Also in which novel does Bingo the dog appear? One of the characters says "Bingo doesn't get the big picture" while Bingo attempts (unsuccessfully) to have sex with someone else's leg.

Many thanks.