I see only one free black listing in NC in 1850:

Sauls, Hendrietta

State: North Carolina Year: 1850

County: Craven Roll: M432_626

Township: New Berne Page: 289

Image: 136

The only slave holders I see listed are in SC:

SAULS, CHRISTIANA

State: SC Year: 1860

County: Beaufort District Record Type: Slave schedule

Township: Prince Williams P Page: 157

Database: SC 1860 Slave Schedule

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SAULS, WILLIAM A.

State: SC Year: 1860

County: Beaufort District Record Type: Slave schedule

Township: St. Lukes Parish Page: 079

Database: SC 1860 Slave Schedule

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SAULS, BENJAMIN

State: SC Year: 1860

County: Colleton District Record Type: Slave schedule

Township: St. Pauls Parish Page: 467

Database: SC 1860 Slave Schedule

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SAULS, BENJAMIN

State: SC Year: 1860

County: Colleton District Record Type: Slave schedule

Township: St. Pauls Parish Page: 468

Database: SC 1860 Slave Schedule

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SAULS, ISAAC

State: SC Year: 1860

County: Colleton District Record Type: Slave schedule

Township: St. Pauls Parish Page: 467

Database: SC 1860 Slave Schedule

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SAULS, CALEB

State: SC Year: 1860

County: Colleton District Record Type: Slave schedule

Township: St.Bartholomews P Page: 300

Database: SC 1860 Slave Schedule

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SAULS, ISAAC

State: SC Year: 1860

County: Colleton District Record Type: Slave schedule

Township: St.Bartholomews P Page: 300

Database: SC 1860 Slave Schedule

The only Sauls I see with birthplace Canada in any census period are listed as white.

Perhaps you should get more details.

Denise