Thursday 27 February 1661/62
This morning came Mr. Berkenshaw to me and in our discourse I, finding that he cries up his rules for most perfect (though I do grant them to be very good, and the best I believe that ever yet were made), and that I could not persuade him to grant wherein they were somewhat lame, we fell to angry words, so that in a pet he flung out of my chamber and I never stopped him, having intended to put him off today, whether this had happened or no, because I think I have all the rules that he hath to give. And so there remains not the practice now to do me good, and it is not for me to continue with him at 5l. per month.
So I settled to put all his rules in fair order in a book, which was my work all the morning till dinner. After dinner to the office till late at night, and so home to write by the post, and so to bed.