The correct position when the pen is at the bottom of an extended letter below the line, the pen being, as shown, nearly perpendicular.
Thomas E. Hill, Hill's Manual of Social and Business Forms (Chicago: Hill Standard Book Co., 1893) 24
2400×1985, 801.3 KiB
1024×846, 108.5 KiB
640×529, 57.1 KiB
320×264, 21.3 KiB