Complex sentence: Anna Brownell Jameson and Charles Eastlake were alerted to Botticelli, works by his hand began to appear in German collections, and the Pre-Raphaelite Brotherhood incorporated elements of his work into their own.
Split into simpler sentences: Anna Brownell Jameson and Charles Eastlake were alerted to Botticelli as well, and works by his hand began to appear in German collections. The Pre-Raphaelite Brotherhood incorporated elements of his work into their own.