Patent ID: 7624508

Claim:
A method of building a wall, comprising: inserting a first pole vertically into the ground at a first location; inserting a second pole vertically into the ground at a second location; providing first and second alignment devices each comprising: a main body configured to slidably engage a generally vertical support pole, the main body including a first arm and a second arm projecting away from the main body, the first arm defining a predetermined angle relative to the second arm; and a reel assembly on the main body for supporting a reel of string; the main body further including a string guide between the reel assembly and the first arm for guiding a string from the reel to the first arm; placing the first alignment device over the first pole; placing the second alignment device over the second pole; placing a reel of string on the reel of the first alignment device; pulling the string from the reel of string along the first arm and to the second alignment device; attaching the string to the second alignment device; and providing a plurality of masonry blocks; and building a masonry block corner at each of said first and second poles.