Unravelled Knots is the third and final installment of the Old Man in the Corner stories by Baroness Orczy. After a break of several years, Polly returns to the ABC Tea Shop to find the Old Man at his usual table with his glass of milk and bit of string. With a just a little encouragement, he is ready to share more unique solutions to the unsolved mysteries that have baffled both the public and the police. Summary by J. M. Smallheer