They are two separate things.
1) "He discerned that Christ would return invisibly" ....
2) "...that “the appointed times of the nations” would end in 1914."
But by sticking them together with an "and" in between, they successfully achieve their objective. Keep the dubs in the dark. Machiavellian indeed.
CTR was counting on a physical return in 1879, but when it failed, he moved it to 1914. To save face, he invented the parousia nonsense as a stop-gap measure.
In 1914, he was on the roof of the Bethel with his disciples, dressed in white robes, waiting for the Lord to appear and takem' home. More disappointment.
CTR died a sad and broken little man, all full of himself. The governing boobs know this to be true. But alas, they work for SATAN.