butter each brick with a thin layer of mortar
place brick checking carefully for level and plumb
Work the Other End
Install the next three bricks at the opposite end of the slope. This allows for running a string line from one end to the other, helping keep the bricks level and plumb. Carefully butter each brick with a thin layer of mortar (Image 1) then place each brick carefully, ensuring they are level and plumb. Follow the chalk line as the reference for the top surface of the bricks. (Image 2).