Source: The Manchester Republican, November 20, 1873, Ad:

New Restaurant and Dining Hall. D.N. HAGANS.
Would announce to the public that he has started a First Class Restaurant and Lunch Room on MAIN Street, in the Room formerly occupied by Green & Danforth, Opposite the Bank, where meals are served at all hours. Oysters Fresh by the Dish or Can, Served in all styles. Sardines and the usual Lunch preparatories always on hand.

Source: The Manchester Republican, December 4, 1873, Ads:

--If you want a good lunch, don't forget to call at the old stand of Green & Danforth.
--If you want a good square meal call at D.N. Hagan's.
--If you want a good dish of Tripe, Pig's Feet or Tongue, call at the New Restaurant.