The authors make clear something that I have known for some time: that the "General Longstreet" whose name is associated with the ancient palms is NOT the Confederate Civil War General James Longstreet. The man who built the mansion off West Adams Boulevard with its once-world-famous twin lines of Washingtonia fan palms was a General Charles Longstreet, who died in Los Angeles in 1877. The year of his death suggests that the date given by the USC Digital Library for one of the earliest photos of Palm Drive (c.1875) is very likely correct. The even older image below (the earliest-known photo of the Longstreet Mansion and Palm Drive) therefore probably dates to c.1870, which I now feel comfortable assigning as the time that the palms were actually planted. Since fan palms of that height are no less than 5 years old, I therefore believe it has now been conclusively established that these trees did, in fact, begin their lives during the American Civil War, approximately 150 years ago.
Dating to c.1865, then, these palms are older than almost every man-made structure not only in Los Angeles, but in all of Los Angeles County, as well. I am so gratified to know that the remaining palms are now recognized for their historical significance by the good people of Los Angeles Orthopaedic Hospital, who I'm sure will protect these venerable Civil War veterans for as long as they shall live.