Further excavation eventually produced more kegs of black powder and several hundred cannonballs.

The excavation has produced numerous books and reports on the findings.

Apart from the boat itself, the excavations did not produce any major associated artifacts, with the exception of a single pottery shard.

Archaeological excavations in the 1920s produced evidence which suggests a hill fort was built on the headland where the castle now stands.

An excavation in 2004 produced a number of finds which are available in Derby Museum.

Unsystematic excavations in the early twentieth century by local residents produced flint tools and human remains.

Further excavation by Tingley in 1888 produced several artifacts.

Archaeological excavations have produced evidence of a 14th-century battle on the site.

Osmanagić claims the excavation has produced evidence of building blocks as well as tunnels.

The excavations had produced vast amounts of artifacts and data, but as yet there was no final publication.