If his Title be ſhort, he Sets it in the middle of the Line, by Setting Quadrats on both ſides: If his Title be long, he Sets the middle Line in the middle: If it make three or more Lines, he Indents the firſt with an m Quadrat, and the other with two m Quadrats.
1683, Joseph Moxon, Mechanick Exercises: Or, the Doctrine of Handy-Works. Applied to the art of Printing., volume 2, pages 222–23