“We must, whether from existing evidence of from supposition, recover the original scheme of the edifice as conceived by the first builder, or as begun by him and developed by his immediate successors; or, on the other hand must retain the additions or alterations of subsequent ages, repairing them when needing it, or even carrying out perhaps more fully the idea which dictated them ... For our own part we decidedly choose the former; always however remembering that it is of great importance to take into account the age and purity of the later work, the occasion for its addition, its adaptation to its users, and its intrinsic advantages of convenience.” (35)