Clue No. 1
The Vanishing Footstep
A footprint in the dust at the threshold -- yet none in the snow beyond. The figure entered, but none witnessed their passage. Notation: footwear narrow, heel uneven, perhaps once polished by a person of habit.
-- from the Casebook of Inspector V., entry 47
Clue No. 2
The Whispering Letter
An envelope sealed with grey wax, opened in 1923, sealed again at midnight -- the ink fresh, the date perpetually that very day. Read aloud, the words rearrange themselves before reaching the ear.
-- annotated by the Archivist, marginalia