William became a partner in Prowse and Sons on Jan 1, 1884. Following Samuel Prowse’s death in 1902, William retired from the business, selling his share to his half-brother, Albert, who continued the business alone under the same name.
At the time of his mother's death in 1907, William was living in Winnipeg, Manitoba. In 1925, he was living in Charlottetown, which is where he lived at the time of his death, on August 12, 1940
It may be possible to confirm family relationships with William by comparing test results with other carriers of his Y-chromosome or his mother's mitochondrial DNA.
However, there are no known yDNA or mtDNA test-takers in his direct paternal or maternal line.
It is likely that these autosomal DNA test-takers will share DNA with William: