I remember with Pleasure & Thankfulness the Civilities I received from you when I formerly visited Rotterdam in company with Sir John Pringle.—

The Bearer of this, is a young Physician of Pennsylvania, who travels for Improvement in his Profession. As he will be quite a Stranger in Holland, I take the Liberty of introducing him to you, believing you will have Pleasure in giving him such Counsels, & communicating to him such Lights, as may render him more serviceable to his Country.—

I send by him some Pieces of my Writing, which have been collected and printed in England. I wish they were more worthy the Acceptance of our Batavian Society, which I hope continues to flourish.— With great Esteem & Respect I have the Honour to be, Sir, Your most obedient & most humble Sert.