The objects on view are certainly some compensation for the disruption happening above ground. The oldest is a piece of amber, age about 55 million years. The other objects are much newer, but still range across the whole of London's history - from prehistoric bison bones to all sorts of Victoriana.
Some objects speak of everyday life - the domino discarded at an eighteenth-century tavern, the railway crockery found at Paddington.
An empty bottle of Mushroom Catsup, its label still largely intact, reminds us that Crosse & Blackwell were once based in Soho. Nearby, a chunk of medieval clinker-built boat is being sprinkled with water to keep it in good condition.
The star of the show is the skeleton, unearthed near Liverpool Street. However, while he may catch visitors' eyes as they enter the exhibition,the smaller objects exert their own fascination as we learn which parts of London's story they are telling. There's so much here already that the prospect of another two years' worth of finds still to come is very exciting.
The exhibition is fascinating, and information boards provide information, context and images to accompany the objects on display. Unfortunately it's open to the public for one day only, but there are hopes of finding other venues. Let's keep our fingers crossed that a longer opening is possible in the near future as this deserves to be enjoyed by many more people than can visit in a day. In the meantime, if you can - go!
Practical info: Bison to Bedlam is open Saturday 7 July 2012, 10am-5pm, at the Music Room, Grays Antiques, 26 South Molton Lane, London W1K 5LF (nearest tube: Bond Street). Admission free.
Further reading: IanVisits was also there.