Neptune in Cancer

Adams in 1930 retells a Greek sorting of the world in which water fell to Poseidon, Neptune's counterpart, and she names Neptune lord of the ocean. Cancer counts as a water sign in the later manuals, which makes the pairing look natural on that one basis. She is talking about mythology and makes no claim regarding this sign.

Ptolemy exalts Jupiter in Cancer, and Alan Leo, before 1917, matches Neptune with Jupiter in the way he matches Uranus with Saturn. He rates both Jupiter and Neptune temperate, with Neptune leaning toward moisture. The Moon's house thus holds a planet he thought damp by nature, an observation drawn from his weather notes alone.

Its most recent stay lasted from 1901 or 1902 until sometime between 1914 and 1916. Everyone born in those years has it. Some modern tables name this sign as Neptune's exaltation and others do not, a live dispute without a source here, and any reading of those births as one kind of person is a modern reading.