“Following on from what you've just said, can we assume this laboratory is in Russia?” she asked. He did not answer the question. “I have a good, well-practised memory, but it's not as it once was. I forget things now that I would not have done when I was a field agent. Here.” He reached inside the breast pocket of his suit jacket and removed a torn, perforated sheet of note paper on which were four outwardly innocent words: Diatom, Apicomplexan, Microsporidium, and Leishmania Major. I knew the last one to be a parasitic protozoan, a microscopic, one-celled organism that can rapidly multiply in humans and can be the linchpin to many devastating diseases. “What do these organisms have to do with ethnic DNA you mentioned, Nikita? I noticed you stressed the word ethnic when you were speakin

