Hugh C. Leighton Co.

The Hugh C. Leighton Co. of Portland, Maine, was a printer and a major publisher of national view-cards, mostly of New England, from 1906 to 1909 when they merged with Valentine & Sons. Most of their cards were printed in Frankfort, Germany, but some were printed in the United States.

Black Hand Interurban Tunnel, Zanesville, Ohio (1907)
Vintage postcard (c. 1907) depicting the Black Hand Interurban Tunnel in Zanesville, Ohio.
High School, Middletown, Connecticut (1908)
Vintage undivided back postcard (1908) showing the high school in Middletown, Connecticut (1908)

Source: Metro Postcard