When a non-freeholder stayed in London he had to find for frankpledge, three sureties for good behavior.
"Our Legal Heritage, 5th Ed." by S. A. Reilly
Of these the most important was the "view of frankpledge" and its attendant police jurisdiction.
"Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 6" by Various
But the history of the frankpledge proper begins not earlier than the time of the Norman Conquest.
"Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 1 "Franciscans" to "French Language"" by Various
A similar conclusion has been reached as to Canute's responsibility for the institution known as frankpledge.
"Canute the Great" by Laurence Marcellus Larson