That is an exciting discovery. It would be an enjoyable project to uncover that, and analyze and document the miniscule details and apparent reasoning behind them. All of the means of fastening, joinery, could be studied. If one were to look closely, the work probably contains little idiosyncrasies, mistakes, changes of mind, tool marks, etc. Altogether, it would contain an enormous amount of information.

Recently, in another discussion, the topic was about the origin of standard gage. It got into the usual story about the width of horses rear ends, wagon grooves worn into pavement, etc. But the question leads to a field of answers that is just too vast to come to one simple conclusion. It also leads into the context of another question which concerns the origin of railroads. If “railroads” are defined in the most elementary sense, this question too leads to a field of study involving waggonways, or rutways; and the “chicken-or-egg” question of whether the wagons made the ruts or the ruts were made for the wagons.