‘Know that our brother Timothy has been set at liberty; with whom, if he come shortly, I will see you.'
This may indicate a personal note added at the end of the letter, commencing here in true Pauline fashion as though he had taken up his pen himself. It is clear that Timothy had recently been in prison but has now been released, and that he expects to meet up with him, and then come to see them. This might be seen as supporting Pauline authorship, but it could equally refer to one of his band of fellow-workers who along with Timothy and others is carrying on Paul's work. It could, for example, be seen as supporting Lucan authorship.