The answer for the riddle 6:
Robert Kennedy and his wife Ethel
6 Ether Monument
"Neither shall there be any more pain"
Installed in the Public Garden in 1868, the Ether Monument is the oldest sculpture in the park, yet the only monument in the world - to medicament!
In the middle of the 19th century, the use of pain relief was considered a miracle, contemporaries wrote that it was the greatest invention after printing.
The name of the discoverer of the anesthetic properties of ether is not indicated on the monument since several people claimed this title.
Therefore, the sculpture depicts an abstract Moorish doctor, the "Good Samaritan", holding a sick young man in his arms.
In fact, the first public demonstration of ether as an inhalation anesthetic was by William T.G. Morton, Boston dentist, October 16, 1846.
The Massachusetts General Hospital, where this procedure took place, is about a 15-minute walk from the site of the monument.
The operating room where the experiment was carried out was renamed to Ether Dome.