Then a number of huge bangs shook the castle, and a great cavalcade of transparent figures galloped past on horses, their heads screaming with bloodlust under their arms.
Accustomed as she was to deal with cattle, she was not alarmed at her situation, but took advantage of every opportunity to urge her horse on, in the hopes of pushing her way through the cavalcade.
Marco Polo wrote sometimes the stray travelers will hear the tramp and hum of a great cavalcade of people away from the real line of march, and taking this to be their own company, they will follow the sound.