The photographer is a true American success story. He was William Manewal who was born 6 Sep 1872 in Wörrstadt, Germany and immigrated to the United States in 1890 at age 18 on the ship Rhynland which sailed from Antwerp, Belgium I found numerous hits for him on Ancestry.com including a listing in the Jersey City, New Jersey City Directory 1893 in which he listed his residence as 807 Hudson and his occupation as photographer. Ten years later in 1903 according to the same city directory he was practicing his occupation at 520 Washington St. in Hoboken, NJ where this photograph was taken. On 18 May 1903 he applied for a US Passport and listed this additional information: wife Albertina (Wassner) Manewal, two children William 9 years and Adelfed 9 months, he became a naturalized citizen of the United States on 9 Mar 1900. Manewal was 5'8" tall, had brown hair, blue eyes and had a light complexion. By 1930, Manewal and his wife were living in Teaneck, Bergen County, NJ where he still earned his living as a photographer.
I also found a number of his photographs on Google as well as a short biography written by William Nelson (see source below), which described him as "a leader in his particular field of art" and "he is regarded as an expert in his art.....his patronage comes to him from far and wide." According to the author, Manewal studied in Paris, France and Venice, Italy before immigrating to the United States where he opened a photographic studio in Hoboken upon his arrival. He became extremely successful and was a member of a number of organizations including the New Jersey State Photographic Art Association, Hoboken Lodge, Benevolent and Protective Order of the Elks and the Hoboken Academy.
Source: Nelson's Biographical Cyclopedia of New Jersey, Volume 2 by William Nelson, 1913, publisher Eastern Historical Publishing Society, New York.