Much of my time of the last few months has been occupied with the details of building a small addition to our herbarium building to contain the botanical library. It is just finished, and the books will now be moved into it in a few days....

My health is excellent. Let us hope the same for you, and offer my best wishes for the year 1880.

Dr. Gray delivered in the winter of 1880 two lectures to the theological school of Yale College, on Natural Science and Religion.

They were long and carefully thought out, and he had great pleasure in speaking to an audience who followed him so closely, and evidently with such attentive sympathy.

He also enjoyed very much reading them, before delivery, to his friend Dr. O. W. Holmes, in Boston.

TO G. FREDERICK WRIGHT.

Cambridge, January 17, 1880.

Dear Friend,—We go Monday night on to Washington, leaving here at five P.M. My lectures are fixed for February 5 and 6, so that I shall return from Washington and go on specially to New Haven.

I expect to be at home the last week of the month, but perhaps not on Monday, and I should wish to see you and read my second lecture, which is dragging its slow length along!...

Cambridge, March 11, 1880.