Looking for information about Robert LUMSDEN and where he came from.

I have a Robert LUMSDEN born in Scotland and became a US citizen on 2 August 1847 in Louisville.

1880 census has him living with the Sharald family. The last entry is his granddaughter, Blanche ALMOND. She was not married at that time.
Name Relation Marital Status Gender Race Age Birthplace Occupation Father's Birthplace Mother's Birthplace
B. M. SHARALD1 Self M Male W 35 KY F. Agt. KY KY
Sarah L. SHARALD2 Wife M Female W 32 KY Kepe House PA IN
Carry SHARALD3 Dau S Female W 10 KY KY KY
Mary SHARALD4 Dau S Female W 9 KY KY KY
Arther SHARALD5 Son S Male W 6 KY KY KY
Miles SHARALD6 Son S Male W 3 KY KY KY
Ra. COALMAN7 Other W Female B 48 KY Cook KY KY
Robt. LUMSDAN8 Other M Male W 80 SCOT Carpenter SCOT SCOT
Sarah A. LUMSDAN9 Other M Female W KY Keeps House KY KY
Annie B. LUMSDAN10 Other S Female W 35 KY Teacher SCOT KY
Blanck LUMSDAN11 Other M Female W 9 KY KY KY

Frank G Stewart Seniors papers indicate that "Grandfather LUMSDEN may have owned a grain mill on the Ohio river, Southport, KY