A recent Watchtower article mentions the problems Russell had getting The Plan of the Ages into bookstores, retelling the story of his interaction with Fleming H. Revell. The details are found in the 1907 Convention Report and elsewhere. The article dates this to 1886. This is based on a missreading of the original source material and an apparent lack of knowledge of the 1892-5 replublication of Millennial Dawn under the Saalfield imprint. Saalfield was a job printer, publishing to order. Later the company was a major publisher of Young Adult books. Copies of Plan of the Ages with the Saalfield imprint are probably the rarest of all.
One of Russell's associates dates this event to 1895. This is without doubt the correct date.