Friday 14 March 1661/62
At the office all the morning. At noon Sir W. Pen and I making a bargain with the workmen about his house, at which I did see things not so well contracted for as I would have, and I was vexed and made him so too to see me so critical in the agreement. Home to dinner. In the afternoon came the German Dr. Kuffler,1 to discourse with us about his engine to blow up ships. We doubted not the matter of fact, it being tried in Cromwell’s time, but the safety of carrying them in ships; but he do tell us, that when he comes to tell the King his secret (for none but the Kings, successively, and their heirs must know it), it will appear to be of no danger at all.
We concluded nothing; but shall discourse with the Duke of York to-morrow about it.
Thence to my lute, upon which I have not played a week or two, and trying over the two songs of “Nulla, nulla,” &c., and “Gaze not on Swans,” which Mr. Berkenshaw set for me a little while ago, I find them most incomparable songs as he has set them, of which I am not a little proud, because I am sure none in the world has them but myself, not so much as he himself that set them. So to bed.