One can imagine an impatient spirit getting tired of spelling out a lengthy story on a three-legged table.
But, as I have said, I am willing to assume that, for some spiritual reason unfathomable to my mere human intelligence, that three-legged table is essential.

I am willing also to accept the human medium.

She is generally an unprepossessing lady running somewhat to bulk.

If a gentleman, he so often has dirty finger-nails, and smells of stale beer.
I think myself it would be so much simpler if the spirit would talk to me direct; we could get on quicker.

But there is that about the medium, I am told, which appeals to a spirit.