Kitty's Enemy by Eleanora H. Stooke

AFTER Tim Shuttleworth's formal introduction to the Glanville family his time no longer hung on his hands, for he was now always sure of a welcome next door; and, during the remainder of Bob's holidays, the two boys were constantly together. Bob, who had certainly been prejudiced against Tim at first, soon grew to like him, for he proved a congenial companion, being very good-natured; and, although he owned a passionate temper, it could not be called a bad one, as Bob was not long in finding out.

Kitty watched the growing friendship between her brother and Tim with anything but approval. She could not overcome her prejudice against the plain-faced, red-headed boy, and, perhaps, she was a little jealous of him, too, for monopolising so much of Bob's society; besides which, she still believed he was not guiltless concerning the death of her first rabbit-for, though two years the junior of her brother, she was far more observant than he was, and she had noticed something strange in Tim's manner when he had been shown Fluffy on the night when he had first seen their guest. Tim could not help perceiving that Kitty was not altogether well-disposed towards him, so he tried to propitiate her, and frequently with such success that she forgot her suspicion against him and treated him with the same good-comradeship she exhibited towards her brother.