Shadows Disinterred: Day 13

Word Count: 78,004

Summary of Events:
Dallas finished combining the field and thought about what he wanted to do next: search for a grave so he could arrest the Pedins. He was woken in the night by someone searching in his room; after an encounter that shouldn't have happened Dallas fled the room, and left the Pedins to search for him while he got a few moments to search the house — which yielded results, but unfortunately not enough to give him the right to arrest them. The next morning he overheard a conversation between Shirley and Deby that gave him some clues, but nothing solid enough yet.

Excerpt of the Day:
"He didn't want to walk down the stairs in the dark, but he had no other option, so he went down, focused on the light at the bottom, his ears alert for sounds of the truck, and sounds of approaching people.
Taking hold of the knob, Dallas slowly turned it, terrified someone or something terrifying was going to jump out at him Opening the door enough that he could put his eye to the gap and see something, Dallas looked.
Boxes. There were lots of boxes. Many of them looked old, but some of them looked newer too. Cardboard banker's boxes most of them, although Dallas saw other boxes too, mostly boxes of things for maintaining farm machines.
Slowly Dallas opened the door a little more. There were no banshee screams, no bats, no eerie or ominous ghostly noises, no organs. Just boxes. Dallas slowly stepped into the room and looked around. Just boxes. He could feel his confidence building, but still nervousness chilled him and kept him from getting brazen.
Dallas' senses were on high alert as he looked at each of the boxes. They were labelled clearly in large, bold numbers. Not one of them had a name. They all had numbers, and the numbers didn't make sense to Dallas.
There were no years, no days, it wasn't written out day, month, year numerically; it was just number codes, like serial numbers on every bit and piece of technology, or on vehicles. There had to be an answer to the code, but Dallas didn't have the faintest idea what it would be.
Some of them had the same number, but then had Roman numerals added onto the end, like 58906191, which had I through VII added onto the end. The numbers didn't even go in sequential order either.
Dallas looked around for some kind of pattern; then he noticed that a lot of the boxes' number sequences ended with 91, and the ones that didn't ended with 02. Why those numbers? Where was 03 through 90? 01? 92 to 100?
That had to be a key. The second last pair of numbers Dallas noticed had a wide range, from 01 to 91; the pair before that was almost always 80 or 90, although there were a couple of 01s.
The first two digits ranged from 01 to 99. Dallas was convinced there was some kind of key in the numbers, but how in the world was he going to find it out? Dallas checked the walls, but he found no cheat sheet anywhere — probably unnecessary anyways, they probably had the number system memorized and completely understood it.
Dallas wondered if he should open one of the boxes and see if he could find any information that way that would give him an understanding regarding the box numbers, but then he heard voices."