Bobcat, here is another book written by William Redding.
Our Near Future - a Message to all the Governments and People of the Earth 1896
He certainly agreed with Russell on several points (except for who Israel is/was - Redding was convinced that America was Israel).
In this book, published in 1894, The Millennial Kingdom A Book Of Surprises Containing Unusual Statements Supported By Positive Testimony, Redding does not name 1914/15 as a significant date.
However, Russell did use the date 1914 (around 1894? not sure when he actually named 1914) and later books by Redding, published in 1896, also name this date - Redding says "about 1915" rather than point directly to 1914 in his book Our Near Future. Redding also uses the date of "about 1915" in his book Mysteries Unveiled - The Hoary Past Comes Forward with Astonishing Messages for the Prophetic Future, published also in 1896. Redding believed the new millennium would begin about 1915.
At the back of Mysteries Unveiled, I found a list of books that Redding published with descriptions
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It appears like Russell and Redding shared more than a interest in pyramidology and bible prophecy. They shared beliefs about doctors, medicine and vaccinations.
Redding was writing about the evils of vaccinations long before the Golden Age magazine took a similar stand.