MACKENZIE, William, book-collector, born in Philadelphia, Pennsylvania, 1 August, 1758; died there, 23 July, 1828. He received his education at the academy and college of Philadelphia, and then entered the counting-room of John Ross, in that city. Being in easy circumstances and fond of reading and retirement, although for some time engaged in active business pursuits, he withdrew from them at an early period in his career, and for forty years devoted himself to the collection of rare books, which he bequeathed to the Philadelphia and Loganian libraries, His collection at the time of his death was considered the most valuable in Philadelphia in private hands. Among the works given to the last-named institution were copies of Voragine's " Golden Legend," printed by Caxton in 1481; the first edition of the Bible printed in Rome in 1471, being the second published in Latin; the first Bible printed in Venice in 1485; the first printed at Nuremberg, and a copy of the first edition of the New Testament printed in French. All of the foregoing are very valuable, the "Golden Legend" being to-day (1888) worth $10,000, according to the testimony of an expert. "Mr. Mackenzie," says his intimate friend, Reverend Dr. James Abercrombie. "I believe never had an enemy ; at least, from the purity of his principles and the correctness of his conduct, he never deserved one." He left considerable amounts to various charities.