Re: Washington DC & Baltimore, MD Brinkley's

Catherine Brinkley, age 1 year, 4 months appears in the 1910 census of Precinct 9, Washington, District Of Columbia:
Household Gender Age Birthplace
SELFClarence E BrinkleyM 42y District of Columbia
WIFEBertha S BrinkleyF 29y District of Columbia
SONRaymond E BrinkleyM 10y District of Columbia
DAUCatherine BrinkleyF 1y 4m District of Columbia
The 1910 census record is here:
https://familysearch.org/pal:/MM9.1.1/MKLK-J38
Since the official census date was supposed to be April 15, 2010, Catherine was probably born in December 1908.

There may be a mis-transcription in the 1910 census for Clarence's age, because there is a marriage license for Clarence E. Brinkley and Bertha S. Barrows, who were married 10 August 1899.The Marriage License is here:
https://familysearch.org/pal:/MM9.3.1/TH-267-11818-19020-93?cc=1803979

Clarence E. Brinkley appeared in the 1880 census of Washington, Washington, District of Columbia:
Household Gender Age Birthplace
SELFIssaic H. BrinkleyM 44 District of Columbia, United StatesOccupation = Brick Manufacturer both parents born in Maryland
WIFELucinda BrinkleyF 34 Pennsylvania, United StatesOccupation = Provision Store both parents born in Pennsylvania
SONWilliam H. BrinkleyM 9 District of Columbia, United States
SONClarence E. BrinkleyM 5 District of Columbia, United States
The 1880 census is here:
https://familysearch.org/pal:/MM9.1.1/M6CC-5P6

Isaac and Lucinda had three unnamed children in the 1880s, and on a couple of the birth records she was referred to as Lucinda Snyder.Record here:
https://familysearch.org/pal:/MM9.1.1/F75T-XH9

Lucinda Brinkley, age 40, died 24 February 1886 at the District of Columbia.She was a widow at the time.Record here:
https://familysearch.org/pal:/MM9.1.1/F7RR-R2T