Marty: I know, I know Doc, it's beautiful.
Copernicus starts to whine. Doc goes over to him.
Doc: Oh, it's all right, Copernicus! Everything's going to be fine.
Marty: I'm sorry, Doc, it's all my fault you're stuck back there. I never should've let Biff get to me.
Doc: There are plenty worse places to be than the Old West. I could've ended up in the Dark Ages. They probably would've burned me at the stake as a heretic or something. Let's look at the map. It says here the time vehicle is buried here in a side tunnel. We may have to blast.
NOVEMBER 14, 1955
Cut to Boot Hill Cemetery. An old mineshaft, just like 1985 Doc in 1885 mentioned in his letter, can be seen. Nearby are a few tombstones. Dynamite blows and Marty, Doc and Copernicus, safely hidden away, cover their ears.
Marty: Whoa. I think you woke up the dead with that blast.
Doc: Take this camera. I want to document everything!
Inside, Marty and Doc try to find the DeLorean.
Doc: This reminds me of the time I attempted to reach the centre of the earth. I'd be reading my favorite author, Jules Verne. I spent weeks preparing for the expedition, I didn't even get this far. Of course, I was only 12 at the time. It was the writings of Jules Verne that had a profound effect on my life. I was 11 when I first read "20,000 Leagues Under the Sea." That's when I realised that I must devote my life into science.
Marty notices a little alcove. It's covered with wooden planks, one of which has the letters ELB marked on it.
Marty: Doc...check it out...look at this.
Doc: My initials - just like in "Journey To The Center of the Earth"! That means the time machine must be right through this wall.