January 20, 1859.

12. My dear Acland, —I was not able to write, as I had hoped, from Switzerland, for I found it impossible to lay down any principles respecting the decoration of the Museum which did not in one way or other involve disputed points, too many, and too subtle, to be discussed in a letter. Nor do I feel the difficulty less in writing to you now, so far as regards the question occurring in our late conversations, respecting the best mode of completing these interior decorations. Yet I must write, if only to ask that I may be in some way associated with you in what you are now doing to bring the Museum more definitely before the public mind—that I may be associated at least in the expression of my deep sense of the noble purpose of the building—of the noble sincerity of effort in its architect—of the endless good which the teachings to which it will be devoted must, in their ultimate issue, accomplish for mankind. How vast the range of that issue, you have shown in the lecture which I have just read, in which you have so admirably traced the chain of the physical sciences as it encompasses the great concords of this visible universe. But how deep the workings of these new springs of knowledge are to be—and how great our need of them—and how far the brightness and the beneficence of them are to reach among all the best interests of men —perhaps none of us can yet conceive, far less know or say.