Five.

"'Your Cousin Bill,' I said, with this new idea in my mind. 'Was he the
son of your mother's sister?' (A few details as to heredity add
materially to the value and instructiveness of a specimen.)

"'And supposin' he was. What about it? I want to know what you've been
and done with 'im.'

"'What makes you think I have done anything with him?' I asked.

"'Why, I see 'im go into your 'ouse and I never see 'im come out.'

"'But, my good man,' I protested, 'that is exceedingly bad logic. If you
saw him go in, there is a fair presumption that he went in--'

"'I see 'im with my own eyes,' my friend interrupted, as though there
were other alternative means of vision.

"'But,' I continued, 'the fact that you did not see him come out
establishes no presumption that he did not come out. He may have come
out unobserved.'

"'No, he didn't. He never come out. I see 'im go in--'

"'So you have mentioned. May I ask what his business was?'

"'His business,' my acquaintance replied with some hesitation, 'was of a
private nature.'