Some definitions found on the net
Senectus
Old age, senility - ([defined] ~ to be worn out by old age: senectute, senio confectum esse · to live to a very great age: ad summam senectutem pervenire · old age creeps on )...
Dilatation of heart
(Dilated cardiomyopathy (DCM) is a condition in which the left ventricle, the heart's main pumping chamber, is enlarged (dilated). As the chamber gets bigger, its thick muscular wall stretches, becoming thinner and weaker. This affects the heart's ability to pump enough oxygen-rich blood to the rest of the body.)
Fractured thigh
(Hard for old people to recover from- low recovery rate)
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Early death certifictes post 1837 (say 3 decades) defined it mostly as aging natural decay (Body organ functions were winding down - aging is the time-related deterioration of the physiological functions necessary for survival )