The VC was introduced on 29 January 1856 by Queen Victoria to reward acts of valour during the Crimean War. The traditional explanation of the source of the gunmetal from which the medals are struck is that it derives from Russian cannon captured at the siege of Sevastopol. Recent research has thrown doubt on this story, suggesting a variety of origins. The original Royal Warrant did not contain a specific clause regarding posthumous awards, although official policy was to not award the VC posthumously. Between 1897 and 1901, several notices were issued in the London Gazette regarding soldiers who would have been awarded the VC had they survived. In a partial reversal of policy in 1902, six of the soldiers mentioned were granted the VC, but not "officially" awarded the medal. In 1907, the