Sentence 1: Arthur wrote in his diary every single day. 
 Sentence 3: Arthur even went back to school to find his diary 
 Sentence 4:  Arthur could not sleep and he tried to remember where it was 
 Sentence 5:  The next day, he found it in the lost and found at school 
 Option 1: One day, he decided to burn this diary and purchase another one. 
 Option 2: One day he could not find his diary and looked everywhere.