ok im building a wall dont i trench?

Question

around the set stone then add three quarter stones then add sand and fill the holes with small rocks if im wrong please give some ideas also its a platue type like halk cirle and then behind full cirlce but im thinking thats how u do it

Answer 1

Still don't quite understand the question! Is it a wall that already exits or is it a new wall in which I think that's what the case may be. How high is the wall going to be? .Are you talking about drainage? Footings?