Another argument is that the Hanseatic League was the origin for both the origin of its definition and manufacture, and in its name is that the German name for the Baltic is "Ost See", or "East Sea", and from this the Baltic merchants were called "Osterlings", or "Easterlings". In 1260, Henry III granted them a charter of protection. Because the League's money was not frequently debased like that of England, English traders stipulated to be paid in pounds of the Easterlings, which was contracted to sterling. and land for their Kontor, the Steelyard of London, which by the 1340s was also called "Easterlings Hall", or Esterlingeshalle. The Hanseatic League was officially active in the London trade from 1266 to 1597. This etymology may have been first suggested by Walter de Pinchebek (ca. 1300) with the explanation that the coin was originally made by moneyers from that region. The claim has also been made in Henry Spelman's glossary ("Glossarium Archaiologicum") as referenced in "Commentaries on the Laws of England" by William Blackstone. Yet another claim on this same hypothesis is from William Camden, as quoted in "Chamber's Journal of Popular Literature, Science and Arts", Volume 4. By 1854, the tie between Easterling and Sterling was well-established, as Ronald Zupko quotes in his dictionary of weights.