Read it through once

"A was put into B's cradle in the nursery; B was transferred to the kitchen and became a negro and a slave, [Sensation--confusion of angry ejaculations]--but within a quarter of an hour he will stand before you white and free! [Burst of applause, checked by the officers.] From seven months onward until now, A has still been a usurper, and in my finger-record he bears B's name. Here is his pantograph at the age of twelve. Compare it with the assassin's signature upon the knife-handle. Do they tally?"