Most people assume that ice didn’t exist in summers during the Regency, but the wealthy did have access to it. Ice houses were big, deep wells where ice harvested from nearby frozen lakes (or sometimes ordered and brought in from the Arctic) was kept through the year. A well-built ice house could keep ice for as long as 18 months, which is pretty amazing. That’s how the famous Gunther’s in London managed to provide ice cream throughout the summers.