Make sure you enTAR DIS in de log book Michael! However, if you choose to time travel back to April 1912, better check the navigation. I understand, the short range guidance systems of that particular Police Box are very unreliable and you might just end up at 41-44N..50..14W. Come to think of it: Is this a Eureka! moment?..the secret of Boxhall's error?
Take care when you Open the Box Michael!(was that just a UK series and/or is it too far back for some of you?)