Complex sentence: Through the 1890s, Potter sent illustrated story letters to the children of her former governess, Annie Moore, and, in 1900, Moore, realizing the commercial potential of Potter's stories, suggested they be made into books.
Split into simpler sentences: Through the 1890s, Potter sent illustrated story letters to the children of her former governess, Annie Moore. In 1900, Moore, realizing the commercial potential of Potter's stories, suggested they be made into books.