The original article from which the photos came was in the BBC Magazine in 2003.
"On the one hand, the state considered them dangerous terrorists, but on the other it simply did not know what to do with them," says Ms Tulloch.
"The police and prison officials were so worried about what to do they made sure that every step they took was authorised by the Home Office. In the records you can find daily communications between the governor of Holloway Prison and Whitehall. In that era it was extremely rare for government to communicate so quickly."
But the police surveillance did nothing to stop the movement - nor did it dim the growing support they were finding in the country.
There's also a potted history of the suffragettes on the BBC site.