Martena was particularly praised for his clever policy, calming the existing dispute between the Schieringers and Vetkopers which had developed to an extreme extent in his time.
After three centuries, the Dutch count William III of Holland, made an attempt to take over Friesland during his administration. In 1309, William landed with a fleet of 1500 "heads" in Gaasterland. Hessel had Count William fleeing back to his ships.
Hessel had four daughters and no sons, so his surname was not inherited. The next Potestaat was Juw Juwinga.
- http://www.herweijer.org/index.php?id=13 Kwartierstaat van TRIJNTJE MURKS DE JONG
- Johannes Vlieterp, Midsieuske Skriuwer.