1866: The only known picture of celebrated British woman spy Pam Snowy, whose name was rumoured to be a fiendish anagram. It is said she agreed to this photograph on the proviso that she could wear one of the many incredible disguises that had made her such a valuable agent of the British Empire, thus displaying her prowess and retaining her anonymity. Tragically, she was at this point so old and bewildered she didn't realise that she had put her false beard on upside down.