Anthony Melville Rud, The Devil's Heirloom — all chapters (1922)
“ Perhaps it was the timbre of excitement in the chemist’s voice which decided McKenzie. Perhaps it was the fact that time is always of the essence where examination of a fresh specimen is concerned. At any rate the jovial, canny Scot agreed to run out to the laboratory and glance at the curious puzzle awaiting him under the microscope. An hour later he arrived, greeted Lacey and Krahn with offhanded courtesy, and demanded immediately to be shown this mysterious vegetable interloper they had found in a specimen of human blood. ”
