AFIVE square metre stone map featuring Warwickshire and Herefordshire and the London boroughs, and carved in Caithness, went on show in London's Grosvenor Square yesterday, near the US embassy.

But it is just a small part of a map of Britain which will soon cross the Atlantic to appear in the [pounds]2.5m British Memorial Garden in New York, commemorating the 67 British victims who died in the World Trade Centre on 9/11.

Anish Kapoor, the British artist, won the competition to create a sculpture that will anchor the park, while artist Simon Verity's role is to prepare a stone pathway of grey Caithness f lagstone punctuated by lighter Moray sandstone.

The stones have been cut into curved ribbons by high powered water jets at the Norfrost refigerator factory in Castletown. The sandstone was then cut to fit between the f lagstone ribbons and individually engraved with the name of a county in the British Isles. Two hundred and forty stones will be used to cover 95 counties.

When they reach New York, the stones are to be laid to represent the UK coastline, leaving a landscaped map of Britain in the park.

British dependent territories such as the Virgin and South Sandwich Islands have been engraved onto smaller stones cut as commas, while the shields of the 42 British societies in New York, such as the Daughters of the Empire and the St George's Society, will adorn iron bollards at the end of the garden.

Camilla Hellman, president of the British Memorial Garden, said: "The garden already means a huge amount to Americans because they are so grateful to Britain for everything that we do. It will symbolise and celebrate the relationship between the two countries. It's all about ref lecting, remembering and rebuilding."