Henrietta Vansittart died of acute mania and anthrax at St Nicholas's Hospital in Gosforth. Her death marked the end of a pioneering career in engineering and invention, despite facing societal limitations as a woman in the 19th century.

Henrietta Vansittart was admitted to St Nicholas's Hospital, Gosforth, after being found confused and exhibiting signs of mania. This event marked the beginning of her final months and the decline of her mental and physical health.

Henrietta Lowe married Lieutenant Frederick Vansittart at the British Embassy in Paris. This marriage is significant as it marks a turning point in Henrietta's life, leading to her involvement in her father's work on ship propulsion and her eventual invention of the Lowe-Vansittart propeller.

James Lowe, Henrietta Vansittart's father, patented a new screw propeller design. This is significant as it marks the beginning of the family's involvement in ship propulsion technology and highlights the early struggles for recognition and financial gain in the face of patent infringements.