Great history. Fortunately in this case, San Marco and St. Nicholas have other walkable commercial areas that survive (and are looking better than they have in a long time). I heard a great quote, I think from the mayor of Oklahoma City, something to the effect of "we've built great cities - if you happen to be a car."
Really looking forward to Lost Jacksonville. But what I'd really like to see is a book on our currently existing neighborhoods and districts. Good information on even some of our coolest areas, 5 Points, Eastside, Miramar, etc. is actually pretty hard to come by. If only we knew knew someone...