I sent a letter to the archives a week ago and still not received a reply. How long I have to wait?

The final deadline for reply is the 30. day after receipt, however the National Archives staff are to provide information as soon as its possible. In some cases numerous finding-aids or repertories must be looked through and consultation needed with other archivists for a professional and accurate answer. Usually five to ten workdays needed to wait for a response. For additional comments or complaints contact the Information Office.