

Jeremy Norman Collection of Images - Creative Commons
This "truck" pulled by eight strong horses was large enough and reinforced enough to hold both a traditional Gutenberg-style wooden handpress, and a very heavy new style Hoe rotary printing machine along with, it appears, at least eight people. I have not been able to identify or locate the specific items (presumably broadsides) that the printers were printing and distributing from the "car" as it moved along in the procession.