Lost property

Intermittent tidying in our house has turned up a pair of prescription sunglasses that seem to have been abandoned there.

Black frames, round lenses, in a silky bag inside a clearish plastic case. The bag says French Connection on it, and a somewhat inexpert assessment reckons the prescription is probably a reasonably strong one for a short-sighted person.

Presumably these were quite expensive, so please pass on to anyone you think might have mislaid such things...