With a century-old pedigree connected to a renowned architect and a world-famous author, the leafy coup at 2323 Hyde St. in San Francisco's Russian Hill neighborhood is a kind of hidden treasure in itself.
Originally designed by famed San Francisco architect Willis Polk, the Mediterranean and Tudor-style mansion at 2323 Hyde St. was constructed in 1900 for Fanny Osborn-Stevenson, the widow of author Robert Louis Stevenson, author of "Treasure Island” and "The Strange Case of Dr. Jekyll and Mr.…