Fuentes consultadas1. WWW Grace's Guide, 14/12/2017 John William Heinke (1816-1870) an engineer in diving equipment https://www.gracesguide.co.uk/John_William_Heinke
2. Improvements in diving dresses, and other apparatus for working under wáter, 1856 port. (John William Heinke, Assoc. Inst. C.E.)
3. WWW BL cat., 14/12/2017 Heinke, John William