Black and white photograph of folk singer, Robert "Bob" Rosenthal, singing and playing an acoustic guitar on a rooftop in New York City, New York. In the photograph, a group of young women can be seen watching his performance from their apartment…

Black and white photograph of folk singer, Robert "Bob" Rosenthal, singing and playing an acoustic guitar on a rooftop in New York City, New York. In the photograph, a group of young women can be seen watching his performance from their apartment…

Black and white photograph of folk singer, Robert "Bob" Rosenthal, singing and playing an acoustic guitar on a rooftop in New York City, New York. Scanned from the negative.

Black and white photograph of folk singer, Robert "Bob" Rosenthal, singing and playing an acoustic guitar on a rooftop in New York City, New York. Scanned from the negative.

Black and white photograph of folk singer, Robert "Bob" Rosenthal, singing and playing an acoustic guitar on a rooftop in New York City, New York. In the photograph, a young woman can be seen watching his performance from her apartment fire escape…

Black and white photograph of folk singer, Robert "Bob" Rosenthal, singing and playing an acoustic guitar on a rooftop in New York City, New York. Scanned from the negative.

Black and white photograph of folk singer, Robert "Bob" Rosenthal, singing and playing an acoustic guitar on a rooftop in New York City, New York. In the photograph, Bob is seen performing while seated on a rooftop ledge, with his reflection shining…

Black and white photograph of folk singer, Robert "Bob" Rosenthal, singing and playing an acoustic guitar on a rooftop in New York City, New York. Scanned from the negative.

Black and white photograph of folk singer, Robert "Bob" Rosenthal, performing on a rooftop in New York City, New York. Scanned from the negative.

Black and white photograph of folk singer, Robert "Bob" Rosenthal, singing and playing an acoustic guitar on a rooftop in New York City, New York. Scanned from the negative.

Black and white photograph of a gathering of young students and folk musicians casually singing and playing guitars outdoors on the campus of Michigan State University in East Lansing, Michigan. Scanned from the negative.

Black and white photograph of a large gathering of students and young folk musicians casually singing and playing guitars outdoors on the campus of Michigan State University in East Lansing, Michigan. Scanned from the negative.

Black and white photograph of two student musicians playing acoustic guitars outdoors on the campus of Michigan State University in East Lansing, Michigan. Scanned from the negative.

Black and white photograph of a gathering of young students and folk musicians casually singing and playing guitars outdoors on the campus of Michigan State University in East Lansing, Michigan. Scanned from the negative.

Black and white photograph of two student musicians playing acoustic guitars among a gathering of students outdoors on the campus of Michigan State University in East Lansing, Michigan. Scanned from the negative.

Black and white photograph of a gathering of young students and folk musicians casually singing and playing guitars outdoors on the campus of Michigan State University in East Lansing, Michigan. In the photograph, the students are gathered in a…

Black and white photograph of a gathering of young students and folk musicians casually singing and playing guitars outdoors on the campus of Michigan State University in East Lansing, Michigan. Scanned from the negative.

Black and white photograph featuring a landscape view of the Forest of Dean, a geographical, historical, and cultural region in the county of Gloucestershire, England. In the photograph, the woodland forest floor is covered with wild ferns below the…

Black and white photograph of a sunlit forest along the Baltic Coast of Poland. In the photograph, the sun is shining through a dimly lit forest and casting shadows upon the forest floor. Scanned from the negative.

Black and white photograph of a sunlit forest along the Baltic Coast of Poland. In the photograph, the sun is shining through a dimly lit forest and casting shadows upon the forest floor. Scanned from the negative.

Black and white photograph of a fortune teller machine located at Salisbury Beach’s Amusement Center in Salisbury, Massachusetts. In the photograph, a sign is hanging above the machine that reads, "Grandma Tells You How? Why? When? Get a Reading…

Black and white photograph of an outdoor fountain and sculpture located in a wooded area in the Karlsruhe Schlossgarten, or Palace Garden, the landscape park situated north of the Karlsruhe Palace in Germany. Scanned from the negative.

Black and white photograph of an outdoor fountain and sculpture located in a wooded area in the Karlsruhe Schlossgarten, or Palace Garden, the landscape park situated north of the Karlsruhe Palace in Germany. Scanned from the negative.

Black and white photograph featuring the storefront for "Fox's Diamond Importers" in Holland, Michigan, as taken on July 25, 1961. In the photograph, jewelry and keepsake gifts can be seen featured in the windows for window shopping outside the…