In The Picts and the Martyrs there is a picture of Rattletrap with the Great-Aunt sitting in the rear seat holding a parasol upright . Billy Lewthwaite drives her along the Lake road to Swainsons until he runs out of petrol (PM25). Rattletrap is crank-started: ... Billy, whirling the rusty crank, stirred old Rattletrap to life (PM25).