"The failed deal crushed McClure, precipitating a nervous breakdown in April 1900 that propelled him to Europe to undergo the celebrated "rest-cure" devised by an American physician, S. Weir Mitchell. Prescribed for a range of nervous disorders, the rest cure required that patients remain isolated for weeks or even months at a time, forbidden to read or write, rigidly adhering to a milk-only diet. Underlying this regimen was the assumption that "raw milk is a food the body easily turns into good blood," which would restore positive energy when pumped through the body."