ALL the "witnesses" you have listed, other than Charles Ryrie, who obviously had no first hand knowledge of the subject, were fervent enemies of John Nelson Darby and his doctrines, and particularly of the doctrine of the pre-tribulation rapture. I could draw up a similar list of others who said, and very clearly said, the very opposite to what these men said. Two that immediately come to mind are his close friend and colleague, William Kelly, and Andrew Miller, the author of "Short Papers on Church History." The actual fact is, that no one that is even slightly familiar with the actual doctrine of the nineteenth century Plymouth brethren, or of their debates with these men, would give any credence whatsoever to the accusations made by these anti-dispensationalists. They would be received by ALL such with the scorn they so richly deserve.
And I will state unabashedly that I am very considerably more versed on this subject than Charles Ryrie. He is indeed an expert on Dispensationalism, but is woefully ignorant on the history of its origins. I, on the other hand, am a widely recognized expert on the history of the Plymouth brethren, having devoted literally decades to the study of their writings, and having written many highly detailed papers on them.