Subject: The hole was descending from the opening of the briefcase.
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Posted on: 2013-05-17 17:45:00 UTC

The Disentangler went up the ladder, which was propped at the bottom, to the top, where the opening descended into the TARDIS, to speak to with the DMS Agents.
The ladder was bridging the floor of the TARDIS and the top, where the opening was. If she'd been at the bottom, the other Agents might not have been able to see her in as much detail, and the description would have been out of place.

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