Wizard Peter Blackwell worked for the Pentagram until just before Subversive begins. Here’s one of the classified documents his former employer has on him.
The Pentagram keeps dossiers on the activists of the Women’s League for the Prohibition of Magic, too. What they thought of Beatrix Harper changed a good deal the year Subversive begins:
And there’s quite a bit of plot in the phrases the Pentagram blacked out in the dossier on Ella Knight, Beatrix’s best friend:
(Wondering about the 21st century dates on documents that look straight out of the decades-ago past? Here’s the reason.)