Sometimes we are asked to interpret horaries to determine if an ill person will live or die. I am reading Abraham Ibn Ezra’s Book of Interrogations (Sefer Ha-She’elot), and here is what he has to say:
If the querent poses a question about an ailing person—whether he will die from his illness or recover—observe: if the lord of the Ascendant sign is burnt by the Sun, it signifies his death, particularly if it is in one of the cardines; and the same applies if the lord of the eighth place is in the Ascendant sign or if the lord of the Ascendant sign is in the eighth place.
But if the lord of the Ascendant sign is in one of the fortunate places, and is neither burnt nor retrograde, it signifies that he will survive.
Also observe the significator, for if it is in conjunction or in a malefic aspect with Saturn or Mars it signifies danger, but if it is in conjunction or in any aspect with the benefics it signifies that he will recover.
Know that if the lord of the Ascendant is with the lord of the sixth place or the lord of the twelfth place, or if the lord of the Ascendant is in one of these places, it signifies misfortune; but if it is about to move away from these places, it signifies that he will recover soon.
Know that the fixed signs signify that the illness will linger on, and the tropical signs signify quick changes, for good or evil, and the bicorporal signs signify that after one illness he will come down with another illness.
From the Sefer Ha-She’elot (The Book of Interrogations) by Abraham Ibn Ezra (1089 – ca.1161), trans. Shlomo Sela. Sections 6.1-6.5, p. 267.