The Deep River Public Library in Connecticut occupies a historic building that dates to 1881, predating the library's official establishment by more than fifty years. The structure was originally constructed as the residence of Richard Pratt Spencer, a prominent banker in the Deep River community, serving as a family home during an era of significant economic growth and social development in Connecticut. The building, designed according to late nineteenth-century architectural sensibilities, represents a period when substantial homes were built as statements of success and permanence within their communities. After Spencer's death, the building was converted into the Deep River Public Library in 1933, beginning its second life as a public institution serving the community's educational needs. The transition from private residence to public library marked a significant change in function, yet the building retained many of its original architectural features and spatial configurations, including rooms that had served domestic purposes before being repurposed for library use. Within the library, paranormal activity has been documented since at least the 1950s, making it one of Connecticut's longest-documented haunted locations. The most significant phenomena occur in the reference area and a space that was previously the kitchen during the building's era as a private residence. Two distinct female spirits appear to inhabit the library, distinguished by different ages and characteristics. One spirit manifests as a young woman in her teenage years, while the other appears to be an older woman approximately in her fifties. These spirits, believed to be connected to the building's historical residents, have made their presence known through various paranormal manifestations. The reference area and former kitchen appear to be particular focal points for spiritual activity. The documentation of paranormal activity at Deep River Public Library is exceptionally thorough, with over thirty separate paranormal investigation groups having conducted formal investigations over the decades. This unprecedented level of research has resulted in substantial documented evidence, including electronic voice phenomena (EVP) recordings, photographic evidence, and eyewitness testimonies from trained investigators. The paranormal manifestations include disembodied voices captured on recording equipment, asking questions and responding to inquiries in intervals of approximately twenty seconds. Early morning hours are particularly active, with reports of unexplained noises, voices, and movement before the library opens. Feelings of dread have been reported near the reference area and former kitchen. Julia Spencer, believed to be the widow of the original banker-owner, was allegedly observed by paranormal investigators through photographic evidence and eyewitness testimony. The Deep River Public Library was featured on the Syfy Channel's "Haunted Collector," bringing national attention to its paranormal phenomena. The extensive investigation and documentation has established it as one of the most thoroughly studied haunted locations in the northeastern United States. The consistent pattern of paranormal manifestation over seven decades suggests that the phenomena represent a genuine and persistent paranormal presence rather than isolated incidents. The library continues to serve its community while simultaneously functioning as a paranormal landmark, demonstrating how historical buildings can carry the echoes of their past within their physical structures and spiritual dimensions.