We only ever see 2 of them, they are rectangular, steel gray, with information about a person written on it, they are identical except one of them has a ball chain, the person on a mission is not supposed to take it off. Despite what we are told and shown, these aren’t memory sticks, they have to be identification tags, dog tags. Rectangular so not British, more likely American (but not necessarily, most countries have rectangular ones).
Only Ajay is seen wearing it around his neck, in “Tbilisi” (or ever).
Mary looks at these two guys, one looking conveniently very much like Ajay, the other more or less her height, and decides: “we die”, which probably means exchanging their IDs with these people, or only one of them, since Ajay and Mary seem to be using only one set of tags.
Ajay has the one with the chain, the one that remains with the soldier’s body for identification.
“I got out for a while. Long enough to hide my memory stick.”
Ajay never speaks of a plaster bust, only Sherlock does. He might have placed it on someone else, dead or alive.
Mary, apparently, kept the one that gets collected from the soldier’s body for notification, the one with a smaller or no chain.
If she and Ajay are actually family, she didn’t even have to be inside the embassy, she could have recoverd it later.
When he finds the rectangular AGRA, Sherlock is surprised, as he expected it to be circular: “expected a pearl”, ie a British identification tag.
It means that the black pearl of the Borgias could be code for a British ID disk.
On the plane, despite her American accent, Mary’s wearing a big disk, meaning a British ID disk and asking her neighbour about “the sun”, code for another ID disk: “Did somebody hide the sun? Did you lose it in the war?”
We can only see one, is the other missing or hidden because they don’t match?
After the landing though, her substitute has the complete set of ID disks
Thoughts:
I don’t know why the A.G.RA tags don’t have a full name on them. Maybe only the capital letters are legible for some reason, maybe in some special units the tags only indicate the initials.
A.G. can be short for Gabriel Ashdown or Garrideb Alex, both non gendered names.
Mary’s AGRA tag couldn’t be destroyed in the fire in His Last Vow, a very high temperature would be required.
Sherlock is working on the impossible case of a person being in two places at the same time. This is an example of how Sherlock makes his deductions by creating a whole story to go through a chain of events, making it complicated to explain his theories before the conclusion of a case.
Series 5 will present a realistic version of these events.
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I’m sure I’m way behind on this one and it’s already commonly known, but the first picture shows the flash drive Mary gave John when they took her on as a client after she shot Sherlock. This is John holding it out to her at Xmas.
The second is the one he actually put in the fire; note the difference.
John didn’t dare to read the context of the flash drive himself but he gave it to Sherlock to read. Sherlock didn’t tell John what was in it, but he did tell his opinion about whether to trust Mary or not. Sherlock (and Mycroft) know about Mary’s past and are on charge of her. This thought gives me hope with the terrible mess of the Watson family.
John Watson is a liar too. He did not get rid of 'Mary's' file. The key in the fireplace is different than the original one. Look at the initials closely--there is an extra period between the R and A. Also the letters are shaped differently. The A is more curved and the R doesn't connect to the straight line at the same spot. I don't think it's a prop error. John had both keys in his hands during the christmas scene. In fact, I encourage you to re-watch the entire scene. It's remarkable how much camera time (and close up action) the key has... it's almost like they're telling us to make the connection. ;D
Edited to add:
The very kind http://whosaidanythingaboutflatmates.tumblr.com/ sent me better screencaps to post. Thanks so much. You're a star!
1) A.G.RA shown at Baket St. (The copy John puts in his pocket)
2) A.G.RA- Christmas scene (same as above)
3) A.G.R.A - In the fireplace there is a period between the R.A (Plus the A is curved and the R different too) Conclusion; John kept the original key. Interesting, nest-ce pas?
