I've been dwelling on how to measure distance and time in my fantasy story, and I am currently unsure of which way to go about this. i don't want to invent my own in case i make it too vague. I don't want to use Miles or hours because it feels too modern, I have considered using the league and bell, I've looked up each one and have an idea of how to use them. I guess I'm just nervous of using them in case I get it wrong, in that aspect it would be easier to use hour and mile, but would it ruin it in away. What are/would you do(ing)?