H.G. Wells: This is delicious, far superior to that Scottish place I breakfasted.
Amy Robbins: Scottish?
H.G. Wells: McDougall's.
H.G. Wells: You mentioned your husband before.
Amy Robbins: My ex, yeah. I was married for a while, when I was very young. We met during an anti-war demonstration.
Wells: Ah, the Second World War?
Amy: Are you kidding? How old do you think I am?
Wells: Oh, I'm sorry, the Third World War?
Jack the Ripper: We don't belong here? On the contrary, Herbert. I belong here completely and utterly. I'm home.
Jack the Ripper: It's catching isn't it, violence.
H.G. Wells: Do you still insist that this is all poppycock?
Amy Robbins: That's not exactly the word I had in mind.
Jack the Ripper: My mother was rather an atrocious woman in her way, but her many failings did not include raising mentally deficient sons.
H.G. Wells: Every age is the same. It's only love that makes any of them bearable.
Jack the Ripper: And at dinner last... century, I thought you'd lost your wits.
Amy Robbins: I like that suit. Is that what they're wearing in London?
H.G. Wells: It was when I left.
H.G. Wells: My name is H.G. Wells. I came here in a time machine of my own construction. I am pursuing Jack the Ripper, who escaped into the future in my machine.
Answer: At the end of the movie, he said that he was going to dismantle the time machine, so it's not used again, thus ending this timeline and the timeline we know as H.G. Wells would come to pass. As for the time machine being in San Francisco, if the machine had never been moved or buried, he would have landed in London.