It is an L., depend upon it!"
The author wants the subject to depend on the L.
You cannot depend on the L.
You are requesting something that's impossible.
Three people are sitting in a cafe having lunch.
The firemen are at the lake.
Even if you follow the road all the way around the bay, you won't be able to get a good view.
The woman is sitting in a library reading a book.
San'doro spoke of slaves.