10 Years revealing secrets because there is no excuse for secrecy in religion – w1997 June 1; Dan 2:47; Matt 10:26; Mark 4:22; Luke 12:2; Acts 4:19, 20.
1925 is here described as a “marked year” to advertise the book series “Studies in the Scriptures” and “The Harp Bible Study Course”.
1914 is mentioned as the last “marked date”.