Another visitor to Copper Eagle had some detailed information on the history of the building, and shared the following:
"Construction of this building Guess Block began during May of 1899, after the assay office built for Guess Bros., Assayers & Chemists a month or so more than three years earlier had been disassembled and rebuilt on a lot along Dundee Street, between Copper and Government Streets.
George Arthur and Harry Adelbert Guess were both graduates of Queen's University in Kingston, Ontario. George came to the Boundary Creek district during 1894 and opened an assay office in Midway. Harry soon followed.
After the establishment of Greenwood City Townsite by Robert Wood the brothers opened a second office, in Harry's charge until he departed in mid-1898. George closed the Midway office and relocated to Greenwood, although Harry returned after several months' sojourn in northern Canada's Keewatin District.
Among the occupants of Guess Block in the months after its completion were Jacob Lukov's "gent's furnishings and dress goods" at street level, with Lukov's brother-in-law Arthur Fleishmann as a clerk in the store (September), Dr. James Spankie and nurse Marion "Minnie" Manahan (2nd floor, November), Cunningham & Anderson, Electrical Construction and Supplies (basement premises, early 1900) and Forbes M. Kerby, Civil Engineer & Land Surveyor (2nd floor, mid-1900).
Being of brick construction, Guess Block survived two disastrous fires in Greenwood's early history. The first was on August 3, 1899 when an arsonist's fire destroyed the adjacent Windsor Hotel, Pacific Hotel, and Law Offices of Hallett & Shaw. The second fire, on the south side, gutted George F. Williams' clothing store on August 24th, 1902."
Today, brass plaques bearing the building's construction date of 1899 are still intact. And, the building now sports signage that was painted onto the brick walls when Greenwood served as a movie set for Snow Falling on Cedars. Tourists are often seen standing on the sidewalk, photographing the Copper Eagle's façade.