Of whom I have no certain thing
 No certain crime, charge, or accusation; nothing of any moment or consequence, no particular thing, nothing but a heap of confused notions, of I know not who or what: 
 to write unto my lord;
 meaning the Roman emperor, under whom he served as governor of Judea: 
 wherefore I have brought him before you;
 the whole company then present: 
 and especially before thee, O King Agrippa;
 as being not only a man of eminence, dignity, and authority, but of knowledge in such matters, which the Jews accused Paul of; see ( Acts 26:2 Acts 26:3 ) . 
 That after examination had;
 of Paul, and his case; 
 I might have somewhat to write;
 concerning him, and the charges exhibited against him to the emperor.