Sight is at first a sad enemy to imagination and to those pleasures belonging to old times with which some exertions of that power will always mingle: nothing perhaps brings this truth home to the feelings more than the city of Rome; not so much in respect to the impression made at the moment when it is first seen and looked at as a whole, for then the imagination may be invigorated and the mind eye's quickened; but when particular spots or objects are sought out, disappointment is I believe invariably felt. Ability to recover from this disappointment will exist in proportion to knowledge, and the power of the mind to reconstruct out of fragments and parts, and to make details in the present subservient to more adequate comprehension of the past.