Applause! You guys are great.
I can't hold a candle to your stories, but I lived in my current spot for a few years before sarting to make raised beds (wit sunken floors). While excavating clay, I turned up a bulb or two, and some pieces, and put them back where I found them after the bed was made.
A year or two later, something small happened, and the year after that I had a big, blooming lily.
Now I have a patch that I should have divided last year. Lavatera and blackberries have infested that area since then. Now I NEED to dig them up, uproot and burn the lavatera and #$%^# blackberries, and re-plant the bulbs.
I've been told this guy is
Lily (Lilium 'Black Out')
He sure is dark red! I gave one bloom to a barista around here, and she looked at it with GREAT suspicion and seeming trepidation.