According to a letter by Pieter Janszoon Schagen, Peter Minuit and Dutch colonists acquired Manhattan on May 24, 1626, from unnamed Native American people, who are believed to have been Canarsee Indians of the Lenape, in exchange for traded goods worth 60 guilders, often said to be worth US$24. The figure of 60 guilders comes from a letter by a representative of the Dutch Estates General and member of the board of the Dutch West India Company, Pieter Janszoon Schagen, to the Estates General in November 1626. In 1846, New York historian John Romeyn Brodhead converted the figure of Fl 60 (or 60 guilders) to US$24 (because 24 = 60/2.5, 1 dollar = confused with rijksdaalder = 2.5 guilders). "variable-rate myth being a contradiction in terms, the purchase price remains forever frozen at twenty-four dollars," as Edwin G. Burrows and Mike Wallace remarked in their history of New York. Sixty guilders in 1626 was valued at approximately $1,000 in 2006, according to the Institute for Social History of Amsterdam. Based on the price of silver, "The Straight Dope" newspaper column calculated an equivalent of $72 in 1992. Historians James and Michelle Nevius revisited the issue in 2014, suggesting that using the prices of beer and brandy as monetary equivalencies, the price Minuit paid would have the purchasing power of somewhere between $2,600 and $15,600 in current dollars. According to the writer Nathaniel Benchley, Minuit conducted the transaction with Seyseys, chief of the Canarsee Native Americans, who were willing to accept valuable merchandise in exchange for the island that was mostly controlled by the Weckquaesgeeks, a band of the Wappinger.