Verse Fluctuation Declaration is a V.F.D. code used by changing some of the words in a work of verse. The volunteer reading it will notice the mistakes and find the message. Versed Furtive Disclosure, a collection of poems found by Klaus in the Gorgonian Grotto, gives the following example of the code: If a volunteer used the name of the poem "My Last Duchess," by Robert Browning in a coded communication, the title might instead be "My Last Wife," by the poet "Obert Browning" instead of Robert Browning. Filling in the mistakes would spell out "Duchess R."