text:  And if in the vellum palimpsest lying amongst the other _diplomata_ of human archives or libraries there is any thing fantastic or which moves to laughter as oftentimes there is in the grotesque collisions of those successive themes having no natural connexion which by pure accident have consecutively occupied the roll yet in our own heaven-created palimpsest the deep memorial palimpsest of the brain there are not and cannot be such incoherencies