From Inventing aviation
- Charles Spencer, "Can I rise to the heights my ancestors did? Charles Spencer's aeronautic ancestors were no strangers to showbusiness." The Telegraph, 8 November 2010, "His son Charles Green Spencer is also buried in Highgate, and set up the firm of CG Spencer and Son, which rapidly became a highly successful ballooning and parachuting business. His son Percival (my great-grandfather) took over the business when his father died. We found his grave in St Pancras and Islington cemetery. Sadly, the stone balloon that once adorned the monument is now missing."