In regard to the photo of the Rutherford Firehouse for Engine 4 & Truck 1, The building in the middle is the firehouse for both companies. The building on the left side of the picture if the Elks. TO the right of the firehouse was an old movie theater. That firehouse was closed and leveled. The current firehouse is on the site of that movie theater. The Rutherford Ambulance Corps is now where the old firehouse was. I'll shoot and post an updated photo for you guys.
Here are another couple of shots of Millville NJ Fire Houses. The first, at 2nd and Sassafrass streets, was a combined city hall and fire house. I don't know if it's an earlier or later pic than the postcard shot, posted by Box2565, but I believe it was redone at some point. The second, a substation at Broad and Church Streets, still stands today, though it was renovated into apartment housing. I'm still looking for a pic of the city's first fire house, on Smith Street. As soon as I find it, I'll post it.