This is one is the same in all three books, and is pretty much a twist on brandy, with a dash of gin. So, put some liquor on your liquor, and call it good. I'm not sure what the gin is supposed to be doing here, but I have to say it doesn't sound promising.
2 oz. apple brandy
1 oz cognac
1 dash gin
Eh, this may be a bit weird, but it's not horrible. I still don't understand what the gin is there for. Frankly, I'd be rather fine with just a sip of nice calvados all by itself instead.
This post is part of a series working through some of the cocktails in a Danish bartender's notebook from the 1930s, Lommebogen. You can read more about this project in my initial post, or browse all Lommebogen posts.