HELP IDENTIFY AN EARLY TRUCK

The Historical Society of West Caldwell NJ is has received some old glass photographic negatives and is asking for help identifying a delivery vehicle in one of them. I will forward to them any help you can provide.

Buick made something like this in 1911 but several features differ - the rear of the roof, balloon tires vs high-wheeler, shape of the front fenders. The Ford in front of the truck looks about 1915 to me. Googling some of the other well-known light truck manufacturers of the time - International, Case, REO - I can't find a similar delivery body, although some were still building solid-tired high-wheelers.

Mystery vehicle, 1911 Buick Standard Express, 1914 REO Depot Truck