RULE XI.--A parenthesis should be read more rapidly and in a lower key
than the rest of the sentence, and should terminate with the same
inflection that next precedes it. If, however, it is complicated, or
emphatic, or disconnected from the main subject, the inflections must be
governed by the same rules as in the other cases.
REMARK.--A smooth and expressive reading of a parenthesis is difficult of
acquisition, and can be secured only by careful and persistent training.