1900 U.S. census, Merrimac, Massachusetts, ED 408, sheet 2B: Herbert C. Oak, photographer, and his wife Cora F., enumerated 2 June 1900 on Main Street.
Image · dated 2 June 1900 · source: U.S. Census Bureau, 1900 census (NARA T623), via Ancestry.

How it is shown: Complete page as supplied; no crop, no retouch, no search highlight.
Keep in mind: Confirmed as the household the folder reads. The census gives his birth as November 1854 against the 1853 birth return; the conflict is kept.
Evidence for
- Herbert and Cora Oak, 1900 United States census · the original at United States Census Bureau; NARA T623, roll 646; Ancestry, collection 7602, record 37869962