The third session of the Fifth Congress compelling Mr. Jefferson to be in Philadelphia again, he left Monticello for that city the latter part of December, 1798, and arrived there on Christmas-day. During his stay in the capital he wrote the following charming and interesting letters to his daughters: _To Mary Jefferson Eppes._ Philadelphia, Jan. 1st, '99. My dear Maria--I left Monticello on the 18th of December, and arrived here to breakfast on the 25th, having experienced no accident or inconvenience except a slight cold, which brought back the inflammation of my eyes, and still continues it, though so far mended as to give hopes of its going off soon. I took my place in Senate before a single bill was brought in or other act of business done, except the Address, which is exactly what I ought to have nothing to do with; and, indeed, I might have staid at home a week longer without missing any business for the last eleven days. The Senate have met only on five, and then little or nothing to do. However, when I am to write on politics I shall address my letter to Mr. Eppes. To you I had rather indulge the effusions of a heart which tenderly loves you, which builds its happiness on yours, and feels in every other object but little interest. Without an object here which is not alien to me, and barren of every delight, I turn to your situation with pleasure, in the midst of a good family which loves you, and merits all your love. Go on, my dear, in cultivating the invaluable possession of their affections. The circle of our nearest connections is the only one in which a faithful and lasting affection can be found, one which will adhere to us under all changes and chances. It is, therefore, the only soil on which it is worth while to bestow much culture. Of this truth you will become more convinced every day you advance into life. I imagine you are by this time about removing to Mont Blanco. The novelty of setting up housekeeping will, with all its difficulties, make you very happy for a while. Its delights, however, pass away in time, and I am in hopes that by the spring of the year there will be no obstacle to your joining us at Monticello. I hope I shall, on my return, find such preparation made as will enable me rapidly to get one room after another prepared for the accommodation of our friends, and particularly of any who may be willing to accompany or visit you there. Present me affectionately to Mrs. and Mr. Eppes, father and son, and all the family. Remember how pleasing your letters will be to me, and be assured of my constant and tender love. Adieu, my ever dear Maria. Yours affectionately, TH. JEFFERSON.