Both here and on Facebook, where I post much more interesting stuff much more frequently, the question has been raised: what happened to the bottles I removed?
The answer is I dumped them all in a nearby recycling box.
Germans, notorious as among the stingiest penny-pinching races on earth (sorry guys, you know I love you but it's true), are now collectively spit-taking in a combination of intense disapproval, anguish, and Angstlust: "Dear God!! You mean you just threw away bottles worth €1.78?!??! Typical wasteful American."
Allow me to explain. The bottles were, as I earlier remarked, all covered in some sort of black slime, inside and out. Probably some combination of tannin from rotting tree leaves and fine particulates from automobile exhaust. It would have taken 2 or 3 minutes of hand-washing to clean each one.
Further, the labels had all long since rotted off the bottles. Nowadays, it is the label on the bottle that contains the all-important bar code which machines use to calculate the deposit. Without a label, you're done for.
Now I hear many Germans saying: "So what? Technically, stores are still required to give you the deposit back if you present them with a bottle, even if it doesn't have a label. After all, it's the glass that's important for recycling, not the label. I once saw a rail thin, boil-covered man with mushrooms growing in his beard actually manage to convince a supermarket manager to give him an 8-cent deposit on an unlabeled beer bottle after a 5-minute argument. See, it can be done!"
I've seen that man, too. But I don't want to be that man. So no, I am not earning anything on the bottles.
On another note, it turns out that wading boots are quite cheap. I thought they might be kind of expensive, but that's only because I live near a Sack & Pack luxury camping-supplies store, which has wading boots hand-crafted by transgendered Tibetan orphans selling for €170 per boot. Online, you can get cheap rubber boots for 7 Euros, so that's what I bought.
Once Phase II is complete, I will furnish a thorough report.