What does Percy notice about the farm house as he walks away from it? What bothers him about the attic?

Percy notices or he got the feeling at least, that someone was watching him from the attic.

Explanation:

in the spreadsheet, click on a cell, then type the numbers or text you want and press enter or tab. to write data to a new line within a cell, press alt + enter. to enter the same data in several cells at the same time you must select the cells in which you want to enter the same data, in the active cell write the data and press ctrl + enter.