According to Acts 17:14-16, Silas and Timothy stayed in Berea while Paul was escorted to Athens. Paul instructed his escorts to have Silas and Timothy join him in Athens, but there is no mention of their doing so. On the other hand, in 1 Thessalonians 3:1, 2, we learn that Paul sent Timothy back to Thessalonica from Athens. So Timothy, at least, seems to have joined him there for a short time.
When speaking to [...]