Complex sentence: He was elected president of the fine art jury for the 1867 Exposition; however, his disappointment at being passed over in the distribution of the higher awards told seriously on his health, and in August he was seized with paralysis.
Split into simpler sentences: He was elected president of the fine art jury for the 1867 Exposition. His disappointment at being passed over in the distribution of the higher awards told seriously on his health, and in August he was seized with paralysis.