Penicillin nontoxic in humans by first performing toxicity tests in animals and then on humans. His subsequent experiments on penicillin's response to heat and pH allowed Fleming to increase the stability of the compound. The one test that modern scientists would find missing from his work was the test of penicillin on an infected animal, the results of which would likely have sparked great interest in penicillin and sped its development by almost a decade. The importance of his work has been recognized by the placement of an International Historic Chemical Landmark at the Alexander Fleming Laboratory Museum in London on
Valentine Morris Valentine Morris Valentine Morris (27 October 1727 – 26 August 1789) was a British landowner and politician, responsible for developing the picturesque woodland walks at Piercefield in the Wye Valley, and the Governor of St. Vincent from 1772 to 1779. Born in Antigua, in the West Indies, Valentine Morris was the son of Colonel Valentine Morris (c 1678-1743), a sugar plantation owner and merchant who claimed descent from the Walter family of Monmouthshire and who, in 1740, bought Piercefield House near Chepstow. On his father's death, the younger Valentine Morris, who was then attending school in London, inherited Piercefield. In