[spooky69]

I thought you guys might like to participate in an interactive story. The guidelines are very simple: every poster writes a short passage that continues what was written in the post before them. Here's the start of our story:

There was only one student in the room, who was bending over a distant table absorbed in his work. At the sound of our steps, he glanced round and sprang to his feet with a cry of pleasure.
"I've found it! I've found it," he shouted to my companion, running towards us with a test-tube in his hand. "I have found a re-agent which is precipitated by haemoglobin, and by nothing else." Had he discovered a gold mine, greater delight could not have shone upon his features.