With Ada Sketches, for mezzo-soprano, flute, clarinet and percussion, Mesmerism, for solo piano and chamber orchestra, and Calculus of the Nervous System, for large orchestra, in 2011 the young British composer Emily Howard completed a triptych of works in which she drew decisively on the life and thoughts of Ada Lovelace for inspiration. Today, Lovelace is recognized as a pioneer of 19th-Century mathematics, who in her lifetime attempted to bring together art and mathematics in Charles Babbage's Analytical Engine. She was convinced of the power of mesmerism and believed that there was a possible mathematical calculation for the human nervous system. This article shows how Emily Howard took up and developed musically these central threads of Lovelace's work in her ‘Lovelace Trilogy’.