During her free period, after lunch, Zhenya hurried back down to the black lake to check on her flag. She brought her ruler and another flag with her and the marker to check where things were going. She was curious to see what the tide was doing tomorrow morning at 7am, whether it would be at the exact place her flag was pushed into the lake bed, or if it was higher or lower. She wasn't sure exactly what time did to the tides, and how subtle the changes were. She was wearing her full uniform now, but had decided to bring her wellington boots down with her. She could see the bottom of her flag pole had been covered at least a little with the water, so obviously the tide had changed. She took her shoes off at the driest section she could find and slipped her feet into the boots, removed her robe and rolled her skirt up a little, even though it was above the line of the wellington boots anyway. She didn't wan to have to change, but it didn't look like the tie was even close to the top of the boots. She wrote her name on the second flag, and wrote Day 1 PM on it as well. She walked to where the tide was currently and stuck the flag into the lake bed. There wasn't much difference between the two. She walked a few steps to the first flag and wrote Day 1 AM underneath her name, as she had forgotten to earlier.

To measure the tide, she put the ruler against the bottom of the flag, underneath the water, and took the measurement that was in line with the level of water. It was 2.9 inches. That wasn't much, was it? But it was a lake, and not the ocean. She did a line on her flag pole to indicate what the first reading was, and wrote 1 - PM on it. That told her that it was the first day, and the PM reading. She didn't need to do a 1 - AM on it, as that was just the line against the lake bed. She quickly jogged back to her things and wrote the measurement down on her log sheet just in case she forgot it. Which she probably would have. Next she had to measure the distance between the two flags. It was 15 inches. She looked back over the water and saw that the gradient of the rise of the bed wasn't much. So there was 15 inches of water between the two flags, but that water was actually really shallow. Made sense in her head. She jogged back and put it into her log book, collected all her things and ran back up to the castle to analyse her findings and write about them in her parchment. Too cold to do it out here.