World War I Spy Hero revealed now.
Mabel Elliott was a `modest`spycatcher whose work was not recognised in her lifetime
During World War I, Miss Mabel Elliott worked for the War Ministry in London as a censor of letters.
Miss Elliott found that the business letters of an “american” to an address in Holland contained secret writing in lemon juice (invisible ink) , which when treated revealed information about defence deployments around London and Royal Navy movements around the coast. Mr Kuepferle was arrested and…READ MORE HERE