"Or two dumpy country-women in straw hats sitting in a Hoover cart."

hoover cart
GNU Free Documentation Licensehoover cart - Credit: demijon.us
During the Great Depression, many automobile owners could not afford to power their cars, as petrol was too expensive. They devised a way to use their cars without petrol by cutting off the rear end of the vehicle, attaching a tongue to it and using a horse or mule to pull their car like a cart. These carts were nicknamed 'Hoover carts' after the president at the time, Herbert Hoover.

Today, the term 'Hoover cart' is sometimes used to refer to shopping trolleys used by the homeless to hold all their belongings.