Very sad news. It makes you sit back for a moment to realise just how fragile & prescious life is. And how fleeting the time we all have to walk this earth. We don't always realise until times like this.
Be at Peace John.
Precursors to the motorised bicycle (motorcycle) also 'I think' include BSA, Royal Enfield, Rudge, Indian...
I know that at some of the vintage bi cycle fairs I've been to they've had bicycles that have a motor/engine fitted. The start to the evolution...?