His son, William Harrison, F.R.S., a deputy-lientenant of the counties of Monmouth and Middlesex, died in 1815, at the ripe age of eighty-eight, and was also interred there.

The tomb having stood for more than a century, became somewhat dilapidated; when the Clock-makers' Company of the City of London took steps in 1879 to reconstruct it, and recut the inscriptions.

An appropriate ceremony took place at the final uncovering of the tomb.
But perhaps the most interesting works connected with John Harrison and the great labour of his life, are the wooden clock at the South Kensington Museum, and the four chronometers made by him for the Government, which are still preserved at the Royal Observatory, Greenwich.

The three early ones are of great weight, and can scarcely be moved without some bodily labour.

But the fourth, the marine chronometer or watch, is of small dimensions, and is easily handled.
It still possesses the power of going accurately; as does "Mr.Kendal's watch," which was made exactly after it.