The technology for putting tiny homing devices in eyeglasses does exist, albeit for the much more benign purpose of retrieving lost glasses:

About Saul's glasses: is it just my imagination, or was it hinted that his captors planted a homing device in them?

One of the photos is indeed Carroll's portrait of Alice Liddell (the inspiration for 'Alice in Wonderland') dressed, or half-dressed, as 'The Little Beggar-Maid'.