I have three questions regarding the world of a fanasy story I'm writing, entitled Veilfall, which is set in a world wehre gunpowder has just been invented. I'll probably have more, but these are the three most pressing concerns to me right now, as they're relevant to my current writing. The first question is: How far can a party of four travel on foot in a day, on average? All four are reasonably fit, fairly well armed, and have accompanying wagons of equipment. The second question is: How diverse and intermingled should cultures be from one kingdom to the next? Most of my nations are roughly the size of European kingdoms, like Spain and France. The third question is: Would there be nany way for a creature tht eats copper and tin be able to chemically shift the metals into bronze while generating energy for life processes?