Complex sentence: After the death of his wife in 1837, his economical situation worsened again: in his late years Belli lost much of his vitality, growing an increasing degree of acrimony against the world around him, and variously describing himself as "a dead poet".
Split into simpler sentences: After the death of his wife in 1837, his economic situation worsened again. In his late years Belli lost much of his vitality, growing an increasing degree of acrimony against the world around him, and variously describing himself as "a dead poet".