1900 U.S. Federal Census: the enumerator's header naming "The Boston City Hospital," where Ella was then living and working.
Image · dated 1900 · source: National Archives and Records Administration / Ancestry.

How it is shown: Readable header crop; complete original retained privately.
Evidence for
- 1900 U.S. Federal Census, Boston Ward 24, Suffolk Co., Massachusetts ("The Boston City Hospital") · the original at NARA T623, roll 681, ED 1807, sheet 9, via Ancestry