Members of the Tyrrell family promoted Seabright civic causes through membership in the "Seabright Improvement Society". Siblings William and Susan Tyrrell owned the property where now stands the Santa Cruz Museum of Natural History. William's niece Kate Tyrrell Peck donated the land from William's estate, and the surrounding area is named Tyrrell Park.
- The Sidewalk Companion to Santa Cruz Architecture (4th ed. 2023), Chapter Eight, introduction and following, pages 218-220
- Santa Cruz’s Seabright, by Randall Brown, Traci Bliss, and others, listed in Online History Journal bibliography article.