He returned to Italy with Ursicinus, when he was recalled by Constantius, and accompanied him on the expedition against Silvanus the Frank, who had been forced by the unjust accusations of his enemies into proclaiming himself emperor in Gaul.
He is in all probability the Silvanus 1 who is associated with Paul in the letters to the Thessalonians, mentioned again in 2 Cor.
"SILVANUS PHILLIPS THOMPSON (1851-1916), English physicist, was born at York June 19 1851, and educated at a school in Yorkshire belonging to the Society of Friends, of which body he was a lifelong member.
See Silvanus Phillips Thompson, D.Sc., LL.D., F.R.S., by his wife and daughter (1920).
Now the opening sentence of this letter is as follows: " Paul and Silvanus and Timothy to the Church of the Thessalonians in God the Father and the Lord Jesus Christ: Grace to you, and peace."