Harry Truman actually said...

Dear Steve: I am very loath to see June first come around because, as you state in your very kind letter of the twenty-eighth, it means that...

I know from the lips of President Roosevelt how much you meant to him, and how much he relied upon you.

You know that it is no mere politeness for me to say that I hate to see you go.

My best wishes go with you in your new venture and in anything you undertake.