In his Chronographia, the chronicler Sir Jan Beke tells the story of the siege of Haarlem by the Kennemers in 1274.
He writes: "Johannes vero de Passijn [corrected in the margin to Johannes de Persyn] inclitus oppidum interea clam exiens vehicula kenemarorum cibarijs onustam comprehendit et exinde plurimas villas hostium capitalium inflammavit".
Which can be translated into: "In the meantime, the famous knight Jan Persijn secretly went out of the city, captured Kennemer vehicles loaded with provisions and after that set several enemy villages on fire".[4]
This led the besiegers to leave the siege and return to their homes. They were chased and defeated by the Haarlemmers.
This victory led Jan Persijn to be praised by his people and as a token of thanks, Jan Persijn was given the title of Lord of Waterland and Marken from the bishop Jan van Nassau.
He promptly attempted to build a stronghold, the Swanensborch in the city of Monnickendam, in order to generate income from maritime trade.
In 1275, however, the local inhabitants rebelled and soon the Lord Persijn had to destroy its castle.
As a consequence it seems the lord Persijn lost interest in Waterland and sold half of his title to Floris V, Count of Holland, while he gave the other half to his son Nicholaas van Persijn.
He died soon after, on 26 of December 1283.
