Matthew Poole and continuators on Galatians 6:11

11 Ye see how large a letter I have written to you, with my own hand .

Paul made use of the hands of others in the writing some others of the Epistles as appears from Rom. 16.22. and sometimes he himself only wrote the salutation, 1 Cor. 16.21. but he tells them he wrote this Epistle to them wholly with his own hand; that he might thereby more commend his Love to them and care over them.