Even with the possibility of some winding, irregular paths out of Howrah, there was also a limit to how far I could have gone in the time frame. I’d spent between 12 & 15 hours. If I made some calculations, I could narrow the search.
He is confident that faraway places don't connect to Howrah
He recognizes one of the irregular paths out of Howrah
He guesses his home was less than 15 hours from Howrah
The winding paths from Howrah do not extend very far.