Alisa Crawford, set out to author the only definitive book ever written about De Zwaan. Alisa Crawford holds a master’s degree in museum studies and is the only Dutch certified miller in the United States, an accreditation she earned after years of independent study while working for the City of Holland at De Zwaan. In seeking data about De Zwaan’s original construction, Crawford learned that the De Zwaan in Krommenie had been taken down in 1887, which was three years after De Zwaan had been relocated to Vinkel. She realized that there had, in fact, been at least two windmills in the Netherlands named De Zwaan. Ultimately Crawford was able to prove the De Zwaan windmill moved to Holland, Michigan, had originally been erected in the city of Dordrecht in South Holland as a zaagmolen (sawmill) in 1833. The mill was converted to steam power in 1884 and its eight-sided body, cap, and blades become superfluous. At that point the Van Schayk family purchased it for relocation to Vinkel. They also purchased parts from a different mill, likely the Nooitgedacht (Never Thought) that had been built in 1800 in 's-Hertogenbosch (now Den Bosch), and dismantled in 1883. This information led to the understanding that De Zwaan was about 70 years younger than the City of Holland was led to believe when it acquired the windmill in 1964 and was a hybrid mill built from the structure and components from two to three other mills. Crawford notes "that lineage is what makes De Zwaan unequivocally authentic. Windmills were and continue to be working machines. When they break, they are repaired. When the parts wear out, they are replaced. When they became outmoded, they are repurposed." There is, unfortunately, a lot of inaccurate information in newspapers published between 1964 and 2015 about the origins of De Zwaan. Additionally not all online sources have revised the original build date of De Zwaan. National Register of Historic Places After the publication of her book, De Zwaan: The True Story of America's Authentic Dutch Windmill, Alisa Crawford wrote the nomination of De Zwaan to the National Register of Historic Places on behalf of the City of Holland. The mill was listed on the National Register of Historic Places in 2018. The City of Holland erected a State Historic Marker at De Zwaan in 2019. The text on side one reads: "In 1961 Castle Park resort