I had left answering your question to Mr. Herb Harwood, who is an expert on this subject, and who frequents this forum, but so far, he hasn't.
To cover the extensive history in answering your question is for the most part, beyond the scope of this forum, as there are many events that led to the establishment and eventual discontinuation of B&O passenger service out of Jersey City, over about a 70-year period. The primary train out of Jersey City was the Royal Blue.
Mr. Harwood wrote and published a book on this very subject, Royal Blue Line. It is available from the Company Store of the B&O Railroad Historical Society. Click on the link below my signature for this post, which will take you to the Society's web site. On the left top, click on the "Company Store" link, then the "Books" link, and search for stock number 10059. I suggest you contact Mr. Craig Close, Company Store manager, at [email protected], to see if there are still copies in stock, and for procedures for payment via credit card, if that is the way you'd like to purchase it.