Photograph of Old Town of Cannon. The Texas Historical Marker is visible in the picture. It is a large grassy area with several trees on the side.

Photograph of Old Settlers Park. A stone sign reads "Old Settlers Park", and there are several sports fields surrounded by stadium lights and covered pavilions.

Photograph of a red and white water tower standing over the site of Perrin Air Force Base. Houses are visible in the background behind the water tower. A Texas Historical Marker sits on the lawn in front of the tower.

Photograph of the historical marker in Pilot Grove, Texas. Behind the marker is an empty field and in the background are trees and covered seating.

Photograph of the front of Pilot Grove Baptist Church in Pilot Grove, Texas. One of the windows has a cross in the stained glass and there is a small tower with a cross at the top of it. There are two entrances to the church on either side with a few steps leading up to them.

Photograph of Pioneer Cotton Seed Oil Mill in Sherman, Texas. Now owned by Presco, the wide brick building has two floors and windows set into arches. A stone pediment sits atop the building and frames the name and logo of Presco.

Photograph of Pool Manufacturing Company in Sherman, Texas. It is a beige building with corrugated metal siding. False fronts hang over the building's facade to the left, and an awning is suspended over a doorway.

Photograph of a part of Pottsboro, Texas with a street winding through it. In the background of the photograph, there is a traffic light and several houses. There is a sign that reads: Drug free, gun free, school zone.

Photograph of Primitive Baptist Church of Tioga. It is a small, white, one-story building with steps leading up to the door. There is a sign outside that reads "City of Tioga Community Building".

Photograph of bridges between Oklahoma and Texas spanning the Red River. The bridge on the left is more modern, while the one on the right is of an older design, complete with rusted arched trusses.

Photograph of Roberts House in Sherman, Texas. Three brick chimneys rise out of the three story Victorian building. Green wood and white trim color the gables, arches, and balconies.

Photograph of front of the Sadler Cemetery in Sadler, Texas. The sign for the cemetery is behind the fence and graves with various different headstones can be seen. Some of the graves have flowers placed in front of them.

Photograph of the front of the Sadler United Methodist Church in Sadler, Texas. The church has a few steps and a ramp leading up to its entrance. The windows have some decorative stained glass in an arch.

Photograph of Saint Francis Xavier Academy in Denison, Texas. The building is now used as a church and has the name of it on the front. Above the entrance is a cross and a sidewalk is right outside the building.

Photograph of Saint John Christian Methodist Episcopal Church. The building is made of brick and there are stairs leading up to the second level. There are four white columns at the main entrance. The Texas Historical Marker is visible in the photograph.

Photograph of Samuel E. and Mary C. Marshall House in Whitewright, Texas. The house is two stories with an attic. There is a porch on the first and second floor. There are several windows in the house. There is a gate surrounding the property, and two wreaths are hanging on the gate.

Photograph of Sanborn Ranch. The ranch is an open field with grass and several trees. There are buildings visible in the background.

Photograph of Sand Springs in Denison, Texas. There is a road along the grassy field and trees scattered around.

Photograph of Sherman Little Theatre in Sherman, Texas. The building is comprised of red brick, and masonry repairs are visible along its side. There is a sign on the left side of the building that advertises an upcoming production. To the left of this sign is a Texas Historical Marker. To the right is a red door. The words "Finley Playhouse" are spelled out in white lettering on the upper right portion of the structure, just above two small trees.

Photograph of the Sherman Manufacturing Company in Sherman, Texas. It's a white brick building with a red trimmed roof. Three windows are visible on the side near two small and bare trees.

Photograph of Site of Campus of Old Columbia College. The Texas Historical Marker is visible in the photo. There is a one-story red brick building and a few smaller brick buildings in the photograph.

Photograph of the historical marker for Sophia Porter in Pottsboro, Texas. The marker is in the woods and is surrounded by leaves and trees.

Photograph of St. Luke's Church in Denison, Texas. The church has a slanted roof and stained glass windows. It has a few stairs leading up to the entrance and a sign to the side of the entrance.

Photograph of St. Mary's Catholic Church. It is a large brick building. The middle of the building is tall because of the bell tower. There are many stained glass windows. There is a sign outside for Saint Mary's Catholic Church.