Southwood Smith,
A Treatise on Fever
“ We have seen that the appearance of blood in the stools is not very frequent: that the most extensive ulceration may and commonly does exist without it; still when blood does appear it is generally found in combination with an ulceration which is not only extensive, but which has penetrated deep into the coats of the intestine. But although this be the general fact, yet it must be borne in mind that blood may be poured out in large quantities without the existence of a single ulcer. ”
