Sunrise 6:54: Numbered for what?

There wasn't much doing around Lake Lagunita at dawn this morning. The female Dawn Jogger found neither a pretty sunrise nor a lot geese or duck activity. The year of the hare continues - one greeted her but, as usual, didn't want to pose for a photo. That left the female DJ to ponder why some of the oaks around the Lake are numbered. A past orienteering event? Part of Stanford's horticultural activities? Number 4 oak is where the DJs used to rest the stick needed to gently prod an older Cassie away from the many distractions she'd find on her way around the lake. The DJs miss both pets...