Mr Bragg and Miss McKenzie - abandoned in a box on the steps of Mount Pleasant sorting office ("my parents knew I'd be sent somewhere better") - are custodians of all the world's lost and undelivered letters. On a remote rock with only the wind and the seagulls for company, they play poker (two first class stamps to Rangoon beat an Airmail to Australia) and snap, and engage in a pas de deux of envelopes in which their own lost stories and words are enmeshed with all the undelivered narratives of the world.
Chopped Logic's daft little show may have too carelessly mislaid its own ending to be truly satisfying, but this tale of lost loves and stories sent but not received has real charm. This fledgling, fragile work is still largely unformed, but it confidently melds text and physical work in a little show that demonstrates loads of promise.
· Until Aug 28. Box office: 0131 556 6550.