He had contributed extensively to various publications on theological and educational subjects.

He also wrote on theological, political and literary subjects.

The scope of this school was not limited to theological subjects.

Some other works by him on theological subjects remain in manuscript (as of 1911).

Humphrey was a prolific writer on theological and other subjects.

He is the author of several books on conversion, apologetics and theological subjects.

He went to America to study non theological subject.

He continued his general education by reading widely, particularly on theological subjects.

In addition to these works he published several smaller books on various theological subjects.

He shows little talent for dealing with theological or philosophical subjects.