This week a long overdue article was written saying in summary, why is not more of this story known, why is this history hidden? See that Dallas Morning News article at https://www.dallasnews.com/opinion/commentary/2017/10/06/dallas-hates-erasing-history-much-anyone-know-park-three-slaves-hanged .
The above map shows where Martyr's Park is located:
It is very appropriate that it is simply on the "other side of the tracks" from the tragic location of the J. F. Kennedy Assassination. President Kennedy had introduced what became the Civil Rights Act of 1964 to the nation in June of 1963 in a radio address. He changed the basic civil rights issues from legal issues into moral issues. Remember, this was when everything was segregated by race: schools, neighborhoods, lunch counters. Tragically, his death may have helped speed the signing of this monumental legislation within 9 months of his 11-22-63 death. The Civil Rights Act of 1964 was signed on July 2, 1964.
If Dallas were to build the long overdue memorial for Martyr's Park, they could include the many who died due to the racism that had plagued the US for centuries. This would include the three men who died in 1860, and others publicly killed at gatherings in Dallas, as a focus. A Historical Marker could be placed on the east side entrance to the pedestrian tunnel under the railroad tracks. A Black History Timeline, similar to the one now in the Shotgun House at Dallas Heritage Park, could be placed into the walkway under the railroad track and well lit so people could easily follow Black History back to 1860.
See photos from the location below to better explain.
This is Martyr's Park and the area surrounding it. It is an open canvas for Dallas to write on and preserve an accurate record of our history, and our dreams for the future. Done well it will become a major tourist attraction in its own right.