Building the Third and Remaining Courses
The third course is begun, again, with the quoin brick, which is laid to gauge, level and plumbed on both faces. Course three (and the remaining four courses) are constructed in exactly the same way as the second course, ensuring that the face plane of every new course is ranged in to the first course (see Fig 132, G and H) until the top of the corner is reached. The number of courses that a corner can be built is always equal to the number of bricks in the first course – in this case, seven.
Using this method of construction will result in a corner that is square, level, plumb. In addition, the faces of all courses will be in line, with no deviation in the face plane (see Fig 132, I and J).