"Snifff, snifff ---- another Lost Cause Myth bites the dust. Click the link and check the records."
Goodness, must you be so arrogant about your ignorance of U.S. history?! Your claim and (non-working) link not withstanding, there were a handful of legally owned slaves in New Jersey in the early 1860s. As I recall, the last was an old gentleman owned by the Hoaglands of Rock Road.
To understand how this came to pass, you might want to look up New Jersey's Abolition Laws of 1804 and 1820.
You may want to look up the 1860 US Census. Their count was ZERO!