They broke up on the train.
Trains push his memories to the surface. All the trips into the country as a child. All the trees passing by, leaves changing to red and gold.
The city fades fast, faster then you can imagine. It is so small compared to the stretches of country to the Jersey Shore, to Upstate, to Boston and Maryland and DC.
Looking at Maggie, he could see her fighting her childhood memories. At least he wanted to think she was fighting them, hoping they were there to be fought. She had her nose in a notebook, making a list of things to do.