I believe that her biographers claim for her the credit of the discovery.

The role of the iconoclast is a thankless one and I confess to a liking for Dolly, but I have discovered in Washington's cash memorandum book under date of May 17, 1784, the entry: "By a Cream Machine for Ice," L1.13.4--that is an ice-cream freezer.

The immortal Dolly was then not quite twelve years old.
Washington seems to have owned three coaches.

The first he ordered in London in 1758 in preparation for his marriage.

It was to be fashionable, genteel and of seasoned wood; the body preferably green, with a light gilding on the mouldings, with other suitable ornaments including the Washington arms.