Frankfort's Forgotten Cemetery

“How does a burial ground as large as the Old Frankfort Cemetery, for all practical purposes, become lost to history for almost 150 years?” “What led to the construction of buildings within and on top of the Cemetery shortly after it ceased to be an active burial ground?” 

It is tempting to attribute these developments to the ethnic affinities and economic standing of those buried there.  After all, most of the people were of African descent, and many undoubtedly had been enslaved.  And regardless of their ethnic affiliation, all were relatively poor.  

But this may be a rather simplistic answer.