"I am glad that my little paper on the Aurora Borealis pleased. If it should occasion farther inquiry, and so produce a better hypothesis, it will not be wholly useless.
[Enclosed in the foregoing letter; being an answer to a separate paper received from Dr. Priestley]
"I have considered the situation of that person very attentively; I think that, with a little help from the _Moral Algebra_, he might form a better judgment than any other person can form for him. But, since my opinion seems to be desired, I give it for continuing to the end of the term, under all the present disagreeable circumstances: the connexion will then die a natural death. No reason will be expected to be given for the separation, and, of course, no offence taken at reasons given; the friendship may still subsist, and, in some other way, be useful. The time diminishes daily, and is usefully employed. All human situations have their inconveniences; we _feel_ those that we find in the present, and we neither _feel_ nor _see_ those that exist in another. Hence we make frequent and troublesome changes without amendment, and often for the worse. In my youth, I was passenger in a little sloop descending the river Delaware. There being no wind, we were obliged, when the ebb was spent, to cast anchor and wait for the next. The heat of the sun on the vessel was excessive, the company strangers to me, and not very agreeable. Near the river-side I saw what I took to be a pleasant green meadow, in the middle of which was a large shady tree, where it struck my fancy I could sit and read (having a book in my pocket), and pass the time agreeably till the tide turned; I therefore prevailed with the captain to put me ashore. Being landed, I found the greatest part of my meadow was really a marsh, in crossing which, to come at my tree, I was up to my knees in mire: and I had not placed myself under its shade five minutes before the moschetoes in swarms found me out, attacked my legs, hands, and face, and made my reading and my rest impossible; so that I returned to the beach, and called for the boat to come and take me on board again, where I was obliged to bear the heat I had strove to quit, and also the laugh of the company. Similar cases in the affairs of life have since frequently fallen under my observation.