Commentaries:
Robertson's Word Pictures (NT)
Letters (grammata). Official documents from the Sanhedrin about the charges against Paul.
Any harm of thee (ti peri sou ponhron).
Evil (ponhron). The three aorists (edecameqa, aphggeilen, elalhsen) cover the past. These Jews do not mean to say that they had never heard of Paul. It is hardly likely that they had heard of his appeal to Caesar, "for how could the news have reached Rome before Paul?" (Page).
Other Robertson's Word Pictures (NT) entries containing Acts 28:21:
John 5:47
John 7:15
2 Timothy 3:15
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