Monro secundus claimed, and not without good grounds, to have made important original discoveries in regard to the lymphatic system; but his merits as a discoverer in this department do not interfere with the greater lustre of William Hunter and Hewson. His observations on the structure and functions of the nervous system enjoy the distinction of having called Sir Charles Bell’s attention to the ganglion of the fifth pair of cranial nerves, and to important particulars of the origin of the spinal nerves, which led in no insignificant degree to his own great discoveries. In 1758 Monro published at Berlin his first essay on the Lymphatics, and Professor Black testified to having read this essay in manuscript in 1755. It contained an account of the lymphatics as a distinct system of vessels, having no immediate connection with the arteries and veins, but arising in small branches from all cavities and cells of the body into which fluids are thrown, and stating that their use was to absorb the whole or the thinner parts of these fluids, and to restore them to the general circulation. He showed further by medical observation that in cases where acrid matter was applied to the pores of the skin, or gained access to the cellular membranes, the glands between the parts affected and the centre of the body became swollen and painful, manifestly from being absorbed by the lymphatics. Monro also first ascribed the absorption of bones and other solid parts in cases of tumour to pressure. His various works on the Nervous System, on the Muscles, on the Brain, Eye, and Ear, and on the Structure and Physiology of Fishes, all contain observations which were of considerable value in building up the science of anatomy in the last century, but none of them furnish attractive reading, such as we have found in the works of Harvey and Sydenham. This is somewhat remarkable, considering that Monro shone as an anecdotist, was intimate with all the celebrated Edinburgh men of his time, and was a great admirer of the theatre, being equally attracted by Mrs. Siddons, whom he felt the greatest pleasure in attending as a patient, and by Foote, whose performance as President of the College of Physicians to Weston’s Dr. Last under examination he enjoyed extremely. It was said that Monro sent his own scarlet robe to the theatre for the mock doctor to wear.