Two volumes were published.
The Bible Treasury 15 (1884), page 192 says that this magazine "will commence D.V. Jan 1st, 1885" so that vol. 1 and 2 were 1885 and 1886. Schofield probably went to the OB at the same time as Neatby (who left the Kelly-meetings in January 1887), which would explain why the periodical ceased.