But then our individuality? I often wonder whether something of that wilt cling to our atoms--whether the dust of Johnnie Munro will ever have something of him about it, and be separable from that of Bertie Swanborough. I think it is possible that we DO impress ourselves upon the units of our own structure. There are facts which tend to show that every tiny organic cell of which a man is composed, contains in its microcosm a complete miniature of the individual of which it forms a part. The ovum itself from which we are all produced is, as you know, too small to be transfixed upon the point of a fine needle; and yet within that narrow globe lies the potentiality, not only for reproducing the features of two individuals, but even their smallest tricks of habit and of thought. Well, if a single cell contains so much, perhaps a single molecule and atom has more than we think.
Have you ever had any personal experience of dermoid cysts? We had one in Cullingworth's practice just before his illness, and we were both much excited about it. They seem to me to be one of those wee little chinks through which one may see deep into Nature's workings. In this case the fellow, who was a clerk in the post office, came to us with a swelling over his eyebrow. We opened it under the impression that it was an abscess, and found inside some hair and a rudimentary jaw with teeth in it. You know that such cases are common enough in surgery, and that no pathological museum is without an example.
But what are we to understand by it? So startling a phenomenon must have a deep meaning. That can only be, I think, that EVERY cell in the body has the power latent in it by which it may reproduce the whole individual--and that occasionally under some special circumstances--some obscure nervous or vascular excitement--one of these microscopic units of structure actually does make a clumsy attempt in that direction.
But, my goodness, where have I got to? All this comes from the Birchespool lamp-posts and curb-stones. And I sat down to write such a practical letter too! However, I give you leave to be as dogmatic and didactic as you like in return. Cullingworth says my head is like a bursting capsule, with all the seeds getting loose. Poor seed, too, I fear, but some of it may lodge somewhere--or not, as Fate pleases.
I wrote to you last on the night that I reached here. Next morning I set to work upon my task. You would be surprised (at least I was) to see how practical and methodical I can be. First of all I walked down to the post-office and I bought a large shilling map of the town. Then back I came and pinned this out upon the lodging-house table. This done, I set to work to study it, and to arrange a series of walks by which I should pass through every street of the place. You have no idea what that means until you try to do it. I used to have breakfast, get out about ten, walk till one, have a cheap luncheon (I can do well on three-pence), walk till four, get back and note results. On my map I put a cross for every empty house and a circle for every doctor. So at the end of that time I had a complete chart of the whole place, and could see at a glance where there was a possible opening, and what opposition there was at each point.
In the meantime I had enlisted a most unexpected ally. On the second evening a card was solemnly brought up by the landlady's daughter from the lodger who occupied the room below. On it was inscribed "Captain Whitehall"; and then underneath, in brackets, "Armed Transport." On the back of the card was written, "Captain Whitehall (Armed Transport) presents his compliments to Dr. Munro, and would be glad of his company to supper at 8.30." To this I answered, "Dr. Munro presents his compliments to Captain Whitehall (Armed Transport), and will be most happy to accept his kind invitation." What "Armed Transport" might mean I had not an idea, but I thought it well to include it, as he seemed so particular about it himself.