In my last letter to you I proposed to go immediately to London to spend some time in the Hospitals there. I am now advised to put that off and remai… - Joseph Black

Your happiness on the contrary is quite secure because you place it entirely in making others happy and doing those things to the utmost of your power which you can afterwards reflect upon with satisfaction. I must own your letter had that effect upon me that it made me apply to my work with double eagerness and alacrity with the hopes of being some time what you are at present.

These, sir, are the chief of the reasons which have been urged to me for staying here some time longer & which I thought so good that I determined to acquaint you with them & in the meanwhile [I] will employ my time to the best advantage till I have your opinion of them.
I am D^r Sir Your most affec^te & Dutyfull Son,

I have now studied the Theory of medicine & have likewise been taught every thing upon the Practice which can be learned in a College. I have also seen some real Practice & have even practised a little myself. But all this is not enough.