Complex sentence: But Ries feared conscription in the French occupying army (though he was blind in one eye) and fled Vienna in September 1805; he spent two years in Paris before returning to Vienna, then concertized his way about Europe, landing in London in 1813.
Split into simpler sentences: But Ries feared conscription in the French occupying army (though he was blind in one eye) and fled Vienna in September 1805. He spent two years in Paris before returning to Vienna, then concertized his way about Europe, landing in London in 1813.