The small capital is not used in combination with lower-case in the same word.

We may print GEORGE WASHINGTON, GEORGE WASHINGTON, GEORGE WASHINGTON, or George Washington, but not George Washington.
In manuscript capitals are indicated by three lines under a word or letter, [Symbol: triple line] and small capitals by two lines [Symbol: double line].

A single line [Symbol: single underline] indicates that italics are to be used.
Originally the writers of manuscripts used capitals for ornament and variety in the text.

They followed no rules but each writer was guided by his own judgment and sense of beauty.

As the use of capitals gradually became systematized and reduced to rules, different systems were adopted in different countries.