Hi Mairiuna ! I doubt you have been able to find the solution to the stamp mystery, since you would need a magnifying glass and the physical copies of the stamps to find the hidden letters.
That’s why I will give you the solution right now!
The letter D is found on The Hound of the [...]
. In 1993, Great Britain issued a set of five stamps commemorating Sir Arthur Conan Doyle, creator of the very famous detective characters: Sherlock Holmes and his companion, Dr John Watson. .
Sherlock Holmes on Stamps – GB -1993
Five great novels are depicted on the stamps: The Reigate Squire, The Hound of the Baskervilles, The Six [...]