Arthur E. Marr
See Ron Polito "T.E. Marr (& Son): Isabella Stewart Gardner's Photographers--And More," New England Journal of Photographic History (Waltham, 2020).
Arthur attended Boston Latin School where he received awards for excellence in classics.
photographer, Fenway Court
Corresponded with ISG in 1923
Thomas E Marr & Son
https://www.digitalcommonwealth.org/search?f%5Bname_facet_ssim%5D%5B%5D=Thomas+E.+Marr+%26+Son I.S. 12/28/2017
Early active date of 1911 is based on after his father's death in 1910. In 1917 he is listed in the Documents of the City of Boston, accessed 11/15/18 on Google Books: https://books.google.com/books?id=uNpEAQAAMAAJ&pg=RA1-PA224&lpg=RA1-PA224&dq=arthur+e+marr+photography+boston&source=bl&ots=kJm8Z-dJit&sig=bkihf3bx2Wi7WFyj8lad-DzE_zc&hl=en&sa=X&ved=2ahUKEwioxdu1y9beAhWIT98KHcAtCPUQ6AEwA3oECAUQAQ#v=onepage&q=arthur%20e%20marr%20photography%20boston&f=false . Later active date is from the latest date of Marr photographs in the collection (1925). MP 11/15/18
Updated later active date to 1954 which we have ascribed as Arthur's death date. There are photographs from the Brookline Library of the Sargent Estate available on Digital Commonwealth that are dated to 1965,. perhaps erroneous. E. Reluga 2/14/2019