[9]) A bathhouse in the basement, originally accessed by a tunnel under the front entrance, provided Carnegie's millworkers with a place to shower (at a time when indoor plumbing was not the norm) before using the facilities.

[10] Three sets of decorative cast-iron panels with elements that include a shield and oak leaves are located below the first-floor bay-front windows of the Halsey Wood façade.

[11] Initially re-opening a single room as a children's library in 1983, with kerosene heat, the Society slowly but steadily re-occupied the building.

[12] In October 2013, the Library inaugurated its Art Lending Collection, which enables patrons to borrow original artwork including life-sized puppets, as part of the 2013 Carnegie International Opening Weekend.

The earliest known, Tony Buba's music video from ~1982 of Frenchy Burrito's cover of the Robert Johnson classic, "Terraplane Blues", was filmed in the gymnasium.

[15] The library's gym was turned into an auditorium for the Quantum Theater production of a one man show, The Return of Benjamin Lay, in early 2025.