Once the brick is cut, continue to lay the bricks, starting with the half brick being laid closest to the wall. Follow the pattern of embedding the brick in mortar and butter each end. Make sure the bricks remain level and straight.
Quick tip to butter a brick: don’t have too much mortar on the end of the trowel. Gently place the mortar on one side, then the other, and push it down so that it covers the full end surface of the brick.