Just for reference, The Finished Ministry, 1918, immediately in the preface states:
page 2
"The great Master laid special emphasis on the importance of the messenger to the seventh, or Laodicean, period of the Church, saying that such an one would be "a faithful and wise servant, whom his Lord would make ruler over all His Household, to give them meat in due season."
"Those consecrated Christians who have read and fully appreciated the Truth as contained in the preceding six volumes of STUDIES IN THE SCRIPTURES readily see and agree that Charles Taze Russell was the messenger of the Church of Laodicea. In the mind of every one who believes the Bible the evidence set forth in this volume will establish that fact beyond the question of a doubt."
page 4
"In 1879 Charles Taze Russell began the publication of THE WATCH TOWER, of which he was the sole editor as long as he remained on earth. THE WATCH TOWER was, and is, the first and only journal declaring the presence of the Lord Jesus. Pastor Russell being the messenger to the Laodicean Church, and occupying the position of the Lord's special servant to give the Household of Faith meat in due season..."