Hearing the screams and screeching meows of Mrs. Norris and the crashing of something that sounded like falling books, coming from the library. Filch knew where he must look...
Filch frantically hobbled towards the library. He knew Mrs. Norris was in there from the ruckus he heard. Within what seemed like ten minutes, though it could have been more, he entered the library. The books on the ground could not be unseen; there were hundreds, pages scattered in places, books everywhere, he looked up and saw a moving figure on top of one of the shelves, he could just make out a ginger cat's head peeping from behind the shelf and disappearing again. "HERMIONE'S GOING TO KILL ME, I HOPE YOU KNOW!" he spat fiercely as he looked back to the books and saw them still falling from the shelf. His eyes bulged madly out of his head as he flailed his arms about yelling at her. He seemed more insane than he had been when all this chaos started.
"BRRRREEEEEEOOOOOOWWWWW-RRRRRRR" Mrs. Norris replied loudly, she growled some more as she hoisted herself back up onto the shelf. 'GOOD! SHE CAN KILL YOU THEN! YOU'RE NOT MY MASTER! YOU'RE SOMEONE WORKING INSIDE OF HIM!'
"Here. Have some of this." Filch said exasperated as he set down some tuna on the ground and hid behind a shelf a couple of sections away from her, in hope she would come down for it. 'This will bring her down... I wish I could do magic though... all those wizards and witches knowing how... and then there's me...' he sighed sadly at this thought.
'I PEED ON THAT MOP YOU HAD, I HOPE YOU KNOW AND NOW YOU'RE GIVING ME FOOD WITHOUT WASHING YOUR HANDS!? NO! I DON'T EAT PISS!' Mrs. Norris hissed at Filch and hid under the book she hid in before she decided to find more refuge. She once again felt as though she were under a roof, safe away from Filch who she was sure, was going to kill her.
Filch had nothing else to do; he couldn't find a ladder around that was nearby from what he could see. There was only one thing for it. The only way to bring her down was to climb the shelf himself. He hoisted one leg up towards the first section of the shelf and realized he couldn't reach. Pathetically he jumped up and down in attempt to climb up on the first section. He looked up at Mrs. Norris and realized just how big the shelves were compared to him; they seemed twice the size of a full-grown giant to him.
Mrs. Norris watched from down below as the teensy-looking Filch pathetically jumped up and down, apparently trying to reach the section of the shelf, 'how pathetic! Even his face is pathetic... Scary, but pathetic...' she spat to herself as she watched Filch wide-eyed but quite amused. She found the show below her, rather entertaining.
After what seemed many moments later, Filch finally gave up on his attempts to jump to the first section of the shelf, gathered some books together and towered one on top of the other, making sure each tower was a different size so he could use them as a step ladder to climb to the first section. He hoisted his leg into the air, in attempt to reach the second section of the shelf, when his face contorted, "GAAH! CRAMP! CRAMP! CRAMP!" he yelled and set his leg back down on the first section, trying not to make too much movement in case he fell, as he tried to ease the cramp.
'YOU FOOL! YOU'RE TOO OLD I TELL YOU!' Mrs. Norris yelled, as she meowed loudly at Filch. She looked down, surprised to see Filch had reached the first section of the shelf. She now couldn't help but wonder if he would make it to the second, let alone the twenty-second.
Filch raised his other leg in attempt to hoist himself up to the second section, his eyes widened in alarm as more books fell to the floor. "I'll just leave you here then..." he muttered to himself about Mrs. Norris. "... How do I get down?" he asked himself again, as he looked down, for possible ways of climbing down from the shelves. His tower of books had fallen and he was already too high up to jump. He continued trying to climb to the second section.
'I'm tired of this...' Mrs. Norris thought, unamused, leapt down from the other side of the shelf and made her way to the warmth of the dungeons where she could curl up and go to sleep. She would forgive him once he left her alone, besides; if she found anything intriguing, it would be to see just how long it would take her master just to climb that shelf and realize she'd gone. She silently darted off quietly to the dungeons, entered through the door, found herself a warm corner and curled herself into a ball and fell asleep.