Attached is a pic. What I learned is to start from an offset at the center of the area the distance of the width of the stamp. Mark a light pencil line across the project. Start stamping along the line spacing the stamps about the distance of the vertical lines, about four or five stamps. Then working up from the line, always work up, place the stamp laterial lines in the stamp marks of two of the stamps on the line. Work out from there in triangles. The key is when you need to stamp on the line, to keep the stamps in a level line. Reverse the leather and work up from the other side, always from the center out. Also wet the leather as you go so that you don't have to strike the stamp more than once. Hold the stamp tight so it won't move, with your little finger on the base. Helps eliminate bounce.
I hope what I have learned helps others.
Cattleman