An incredibly rare Roman coin discovered in Acle has been donated to Norwich Castle Museum. The coin -- only the second of its kind known in the world -- was unearthed by Dave Clarke during the Springfield archaeology dig last summer. Acle Parish Council has sent the ancient artefact to Norwich where it may go on display and will be used by experts to identify and date other coins. The coin dates from AD 312 when Emperor Constantine I ruled the Roman world. The only other example was found in the 18th Century and is on show in Lisbon. One...