In 1908, an unnamed correspondent for The Times of London wrote the first public account of the two-year-old library of the financier J. Pierpont Morgan, next to his home just east of Madison Avenue on 36th Street. Modeled by the architect Charles Follen McKim on Renaissance buildings like the Villa Medici in Rome, the library contained Morgan’s storied collections of rare books and manuscripts, and was built at a cost of $50,000, or over $1 million today. Describing the library’s lavish interiors and collections, the correspondent wrote, “The Bookman’s Paradise exists and I have seen it.” This weekend and next, the Morgan Library & Museum will celebrate the restoration of…