William Dean Philbrick (1834-1902) was the younger son of well-known Brookline abolitionist Samuel Philbrick whose house still stands at 182 Walnut St. The photo is for his graduation from Harvard College. He attended the early high school at the top of Walnut Hill and is mentioned in the diary of classmate Adeline Faxon when he walked to her house on Linden St. and asked her to go skating.