1.  1880 United States Census and National Index (LDS Family History Resource File: CD-ROM Library):

Census Place: Washington, Washington, D.C., Washington D.C.
Source: FHL Film 1254123; NARA Film T9-0123; Pg 209D
	Relation	Sex	Marr	Race	Age	Birthplace	Occupation	Fa	Mo
Mary A. MOORE	Self	F	W	W	52	PA	Keeping House	HANOVER	PA
Frank MOORE	Son	M	S	W	27	VA	Painter	CAN	PA
Edward MOORE	Son	M	S	W	25	VA	Painter	CAN	PA
Charles S. MOORE	Son	M	S	W	21	VA	Lawyer	CAN	PA
Otho R. SINGLETON	Other	M	M	W	64	KY	M.C.	KY	KY
Eliza Y. SINGLETON	Other	F	M	W	50	TN	At Home	TN	TN
James B. BECK	Other	M	M	W	58	SCO	U.S. Senator	SCO	SCO
Jane A.J.W. BECK	Other	F	M	W	53	VA	At Home	VA	VA
James P. HORBACK	Other	M	M	W	53	PA	Farmer	PA	PA
Mary C. HORBACK	Other	F	M	W	44	VA	At Home	PA	VA
Mary C. HAZEN	Other	F	W	W	28	PA	Clerk In Treasury	VA	MD
Henry HEAD	Other	M	M	W	58	ENG	Retired Merchant	ENG	ENG
Lotta HYATT	Other	F	W	MU	23	MD	Servant	MD	MD

How can a farmer be living in a boarding house in Washington, DC?