How to parse. ...

Par. 27, 28.] INTERROGATIVE PRONOUNS. 25

27 Uses of "Who," "What," &c.
The pronouns "who," "what," "which," were
once always used Interrogatively:A. (1) " Who has a good conscience?"
In time, questions of this kind were used with
their answers, thus: -
(2) " Who has a good conscience? He is prepared
to die."
Afterwards, for shortness, the two sentences were
blended in one. Then, sometimes the whole of the
Interrogative sentence was treated as a Noun(3) " (Who, or whoever, has a good conscience) is
prepared to die."
But, more commonly, the Interrogative force of
the first sentence was quite forgotten, and "who"
being treated like " that," the two sentences became -
B. (4) " He who has a good conscience is prepared
to die."
28 Again, when Sentence A was made the Object of
a Verb in a preceding sentence, e.g. " I asked," the
second sentence lost its Interrogative force; and
"who," instead of being Interrogatively used, was
used Conjunctively, so as to join the sentence " I
asked" with the following words:C. (5) "I asked who had a good conscience."