Professor Cornelius Jan Bakker, a leading Dutch nuclear physicist, arrived at Huemul Island in Argentina, to audit on Ronald Richter, who had been arrested by Juan Perón.

The Argentine government made a cagily indirect answer last week to reports that Juan Perón had arrested Ronald Richter, his “atomic scientist” (TIME, May 28). Newspapers announced that Professor Richter and his laboratory associates would observe a national holiday by working 24 hours straight.

But Richter made no public…