topic

• Steamboats1
• Waterfalls1

name

collection

• Robert N. Dennis collection of stereoscopic views52

place

• Pennsylvania52
• Delaware River (N.Y.-Del. and N.J.)51
• Delaware Water Gap (N.J. and Pa.)51
• Pike County (Pa.)1

genre

• Photographs52
• Stereographs52

division

• Wallach Division: Photography Collection52

type

• still image52