I'm researching a line of Lucas ancestors who migrated from Virginia to Pike County, Ohio in the early-mid 19th century, and I'd greatly appreciate any information or advice that might facilitate this effort. Below are US Census records for the family of my gggg-grandparents, Mason and Eliza Lucas:

1840 Census, Ohio, Pike Co., Pee Pee Township
Mason Lucas
1 free colored male, age 55-100
1 free colored male, 10-24
1 free colored female, 24-36
1 free colored female, under 10

1850 Census, Ohio, Pike Co., Jackson Township
Mason Lucas 50 M M Farmer Va
Eliza " 30 F M Va
Mary L " 9 F M OH
?????? " 6 F M OH
?????? " 4 F M OH
Sarah " 2 F M OH
Alonzo " 6M M M OH

1860 Census, Ohio, Pike Co., Jackson Township
Mason Lucas 60 M M Farmer 600 400 Virginia
Eliza 40 F M Virginia
Mary 19 F M Ohio
Emma 15 F M Ohio
Sarah 13 F M Ohio
Alonzo 11 M M Ohio
William 9 M M Ohio
Malissa 7 F M Ohio
Julia 5 F M Ohio
Martha 3 F M Ohio

At present, my research is limited to Federal Census records and electronically posted sources like this discussion and Paul Heinegg's Free African Americans of Virginia, North Carolina, South Carolina, Maryland and Delaware. I therefore have not been able to determine the parents or specific place(s) of origin of Mason and Eliza. A much-needed fact-finding trip to Ohio is in the works. In the meantime, does anybody know anything about free black migration patterns to Pike County? Even better, has anyone encountered the names of Mason or Eliza Lucas in their own genealogical research?

Thanks for any and all help,
C.C.