In the presence of the Society Broca gave him verbally a task in multiplication, composed of some trillions to be multiplied by billions.

In the presence of all the members he accomplished his task in less than ten minutes, and without the aid of pencil and paper, solving the whole problem mentally.

Although not looking intelligent, and not being able to read or write, he perhaps could surpass any one in the world in his particular feat.

It was stated that he proceeded from left to right in his calculations, instead of from right to left in the usual manner.

In his personal appearance the only thing indicative of his wonderful abilities was his high forehead.
An infant prodigy named Oscar Moore was exhibited to the physicians of Chicago at the Central Music Hall in 1888, and excited considerable comment at the time.