Henry Pope Clearwater, Ph.D., was born in Hallowell in 1879 and graduated from Hallowell schools. He then studied under Hallowell pharmacist Major John Quincy Adams Hawes until he was able to pass his pharmacist's examination.

He bought the Hawes drugstore and started to specialize in medicine for the relief of heart troubles. His Heart Cure Company was so successful that he sold the drugstore in 1905 and moved across Water Street to the Masonic Building.

By advertising in magazines, newspapers and on radio he created a successful mail order medicine business. A new Hallowell Post Office was built in 1933 to handle as many as 25,000 circular letters a day.

Sales slowed in the late 1940s and the business was liquidated after Dr. Clearwater died in 1952.