And so on for various materials. Quite a science
has been built up around finger-prints.
"I wish I had that enlarging camera which I have in my
laboratory. However, my ordinary camera will do, for all I want
is to preserve a record of these marks, and I can enlarge the
photographs later. In the morning I will photograph these marks
and you can do the developing of the films. To-night we'll
improvise the bathroom as a dark-room and get everything ready so
that we can start in bright and early."
We were, indeed, up early. One never has difficulty in getting up
early in the country: it is so noisy, at least to a city-bred
man. City noise at five A.M. is sepulchral silence compared with
bucolic activity at that hour.
There were a dozen negatives which I set about developing after
Craig had used up all our films. Meanwhile, he busied himself
adjusting his microscope and test-tubes and getting the agar
slides ready for examination.
Shirt-sleeves rolled up, I was deeply immersed in my work when I
heard a shout in the next room, and the bathroom door flew open.
"Confound you, Kennedy, do you want to ruin these films!" I cried.
He shut the door with a bang. "Hurrah, Walter!" he exclaimed. "I
think I have it, at last. I have just found some most promising
colonies of the bacilli on one of my slides.
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