"in three or four months' time she would have been under morphia"
Morphia, now more commonly known as morphine, is a powerful analgesic (pain-killing) drug which is made from opium. It was named after Morpheus, the god of dreams in Greek mythology.
Morphia was first sold commercially in 1827, and became widely-used following the invention of the hypodermic needle in 1857.
Because of its highly addictive qualities, morphine tends to be reserved for cases of extremely severe pain.