sentences:  Founded on June 1, 1829, "The Philadelphia Inquirer" is the third-oldest surviving daily newspaper in the United States.However, in 1962, an "Inquirer"-commissioned historian traced "The Inquirer" to John Dunlap's "The Pennsylvania Packet", which was founded on October 28, 1771.In 1850, "The Packet" was merged with another newspaper, "The North American", which later merged with the "Philadelphia Public Ledger".