BluesBrother said, They never miss a trick in massaging their past mistakes. No they dont. Here is another one, a gem of a lie, from your quote on p622 of the Proclaimer's Book,
He [Russell] discerned that Christ would return as a glorious spirit person, invisible to human eyes.
Russell discerned no such thing. The discovery of the parousia, Christ's invisible presence, was made by a man identified as Bro. Keith, and this was acknowleged in an early Watch Tower, quoted below.
The Problem: Christ didn't return in 1874
(W Feb, 1881 p188 par3 of Reprints)
"Looking back to 1871, we see that many of our company were what are known as Second Adventists, and the light they held briefly stated, was that there would be a second advent of Jesus -- that he would come to bless and immortalize the saints, to judge the world and to burn up the world and all the wicked. This, they claimed would occur in 1873, because the 6,000 years from the creation of Adam were complete then.
"But prophecies were found which pointed positively to 1874 as the time when Jesus was due to be present, and the resurrection of Daniel was also due as proved by the ending of the jubilee cycles and the 1335 days of Dan. xii.
"Carefully they [Second Adventists] examined the chronology but it seemed faultless and positively declared that the 6,000 years ended in 1873... Was an error found? No…the “1335 days” of Daniel could not possibly be prolonged beyond the fall of ‘74 or the spring 1875 and these periods were both past."
The Solution: Parousia is discovered by Bro Keith (a Second Adventist???)
(Par 6 of same article continues)
"Just at this time Bro. Keith, (one of our contributors) was used of the Lord to throw another beam of light on the subject which brought order out of confusion and caused all of the former “light” to shine with tenfold brightness. Brother K. had been reading carefully Matthew xxiv chapter, using the “Emphatic Diaglott,”…37th and 39th verses… “For as the days of Noah thus will be the presence of the son of man….thus will be the presence of the Son of Man.”
"His surprise was, at finding that the Greek word parousia which signifies presence, had in our common version been improperly rendered coming, but the new rendering showed that it was not the act of coming that resembled the days of Noah, but that as in Noah‘s days…it would be at the time of Jesus’ presence at the second advent."
Bro Keith is described by the Watch Tower as "one of our contributors" in an article that showed a relationship between Russell's followers and the Second Adventists. I'm not sure if Keith himself was a Second Adventist or not, but he followed Nelson Barbour who was.
"One of Barbour’s readers, B. W. Keith , came up with a solution. Having obtained a new translation of the New Testament, Benjamin Wilson’s The Emphatic Diaglott, Keith noticed a marginal alternative translation of Parousia, the Greek word normally translated ‘coming,’ namely ‘presence.’ " (From http://home.broadpark.no/~jhauglan/rutherford.htm#_Toc493437572 )
If Keith was a Second Adventist then the concept of Christ's invisible presence is their discovery. If Keith was not a Second Adventist then the credit goes to Keith himself, but in no case did C.T. Russell 'discern it' as the Proclaimer's Book says.
(Does anyone know whether Keith was a Second Adventist for sure?)