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any of the risen reptiles or columns will owe their birth to one only of the two given notions. Now I put the same notion before my mind, and I find that among the phantoms brought forward by reptile, (viz. among a host of lizards, crocodiles, plagiaries, pirates, calumniators, &c.) I notice the sandy plains round Alexandria in Egypt, where I have seen more reptiles than any where else; I notice also among a host of phantoms owing their birth to column, (viz., among the Bourse of Paris, Regent's Quadrant, Drury Lane Theatre, &c.) I notice the same sandy plain round Alexandria in Egypt, where I have seen the most ancient of all columns, Pompey's Pillar.
The mental scenery of my pupil is of the kind I; there is no common phantom.
My mental scenery is of the kind II; there is a common phantom.
Such common phantoms are peculiarly privileged. Out of the two hosts of phantoms a, b, c, d, &c.,
p, q, r, s, &c., but few will be noticed; but what is certain is, that the common phantom cross x will be noticed in preference to the rest. This I account for thus:—each of the phantoms a, b, c, d, &c., is launched upon the imagination by one only of the given notions, viz. by A or by B; while the common phantom cross x is launched upon the imagi-nation by the combined power of A and B. In the above-mentioned example, the sandy plain round
