She sat the exams of the Worshipful Society of Apothecaries in 1891 and passed with excellent marks in anatomy and physiology, and proceeded on to the final portion her studies at the University of London.
Lewis continued with his studies throughout his career, and was awarded his LSA in 1884, MRCS in 1884 and his FRCS in 1890.
He was made OBE in 1945 and a Freeman of the City of London in 1954, and gained further honours later in life from Middle Temple, the Swedish Medical Society, Chelsea College and the Worshipful Society of Apothecaries of London.
According to Hasted, early in the 17th century James Bourne conveyed the estate to Abraham Delaune, the son of Dr. Gideon Delaune, a Huguenot physician and theologian and founder of the Apothecaries' Hall.
Notable people who qualified in medicine as a Licentiate of the Society (LSA) include John Keats (1816), Elizabeth Garrett Anderson (1865, thereby becoming the first openly female recipient of a UK medical qualification) and Ronald Ross (1881).
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She obtained the Triple Qualification, the Scottish variant of the Conjoint qualification, comprising diplomas from the Worshipful Society of Apothecaries, the Royal College of Surgeons of Edinburgh and the Royal College of Physicians and Surgeons of Glasgow.