Https://www.cargomaster.com.au/wp-content/uploads/2012/08/img_slider_05-564x350.jpg"[6] At first useful for relocating coal on and off barges, "free boxes" ended up used to containerize coal from the late 1780s, at destinations much like the Bridgewater Canal. Via the 1840s, iron boxes had been in use as well as picket types. The early 1900s observed the adoption http://Conservablogs.com