Among his works are Antiqua Mater: A Study of Christian Origins (1887, published in London anonymously) and The Pauline Epistles: Re-studied and Explained (1894).
In Antiqua Mater Johnson examines a great variety of sources related to early Christianity "from outside scripture", coming to the conclusion that there was no reliable documentary evidence to prove the existence of Jesus Christ or the Apostles.
Hagioi is a Greek word meaning "saints", "holy ones", "believers", "loyal followers", or "God's people", and was usually used in reference to members of the early Christian communities.
[citation needed] In The Pauline Epistles and The Rise of English Culture Johnson made the radical claim that the whole of the so-called Dark Ages between 700 and 1400 A. D. had never occurred, but had been invented by Christian writers who created imaginary characters and events.
"[3] Johnson contends that before the "age of publication" and the "revival of letters" there are no reliable registers and logs, and there is a lack of records and documents with verifiable dates.