Complex sentence: Alexander contracted tuberculosis and for health reasons relocated in November 1847 to the drier climes of Madeira, Portugal, where he died on 20 February 1848 at the age of 29.
Split into simpler sentences: Alexander contracted tuberculosis and for health reasons relocated in November 1847 to the drier climes of Madeira, Portugal. He died there on 20 February 1848 at the age of 29.