Monro "secundus" took his degree as Doctor of Medicine on 20 October 1755. He then proceeded to his studies abroad. He spent a short time in London, where he attended the lectures of William Hunter. He next visited Paris and on 17 September 1757 entered Leyden University where he formed a friendship with two famous anatomists, Bernhard Siegfried Albinus and Petrus Camper. However his foreign studies were prosecuted principally at Berlin, where he worked under the celebrated Professor Meckel, in whose house he lived. Alexander spent some time in Edinburgh during early 1757 in order to fill the place of his father, who was confined to the house by illness. He finally was admitted a licentiate of the Royal College of Physicians of Edinburgh on 2 May 1758 and as a Fellow on 1 May 1759. He was to be elected President of the College in 1779.