Chapter Nidhogg to Nine of N by Brewer's Phrase & Fable

nine equals “several.”
   A cat has nine lives- i.e. a cat is popularly supposed to be more tenacious of life than animals in general.
   Possession is nine points of the law- i.e. several points, or every advantage a person can have short of right.
   There are nine crowns recognised in heraldry. (See Crowns.)
   A fée asked a Norman peasant to change babes with her, but the peasant replied, “No, not if your child were nine times fairer than my own.” (Fairy Mythology, p. 473.)
   (3) Nine as a mystic number. Examples of its superstitious use:-
   The Abracadabra was worn nine days, and then flung into a river.
   Cadency. There are nine marks of cadency.
   Cat. The whip for punishing evildoers was a cat-o'-nine-tails, from the superstitious notion that a flogging by a “trinity of trinities” would be both more sacred and more efficacious.
   Diamonds. (See “Diamond Jousts,” under the word Diamond.)
   Fairies. In order to see the fairies, a person is directed to put “nine grains of wheat on a four-leaved clover.”
   Hel has dominion over nine worlds.
   Hydra. The hydra had nine heads. (See Hydra.)
   Leases used to be granted for 999 years, that is three times three-three- three. Even now they run for ninety-nine years, the dual of a trinity of trinities. Some leases run to 9,999 years.
   At the Lemuria, held by the Romans on the 9th, 11th, and 13th of May, persons haunted threw black beans over their heads, pronouncing nine times the words: “Avaunt, ye spectres from this house!” and the exorcism was complete. (See Ovid's Fasti.)
   Magpies. To see nine magpies is most unlucky. (See Magpie.)
   Odin's ring dropped eight other rings every ninth night.
   Ordeals. In the ordeal by fire, nine hot ploughshares were laid lengthwise at unequal distances.
   Peas. If a servant finds nine green peas in a peascod, she lays it on the lintel of the kitchen door, and the first man that enters in is to be her cavalier.
   Seal. The people of Feroes say that the seal casts off its skin every ninth month, and assumes a human form to sport about the land. (Thiele, iii. 51.)
   Styx encompassed the infernal regions in nine circles.
   Toast. We drink a Three-times-three to those most highly honoured.
   Witches. The weird sisters in Macbeth sang, as they danced round the cauldron, “Thrice to thine, and thrice to mine, and thrice again to make up nine;” and then declared “the charm wound up.”
   Wresting thread. Nine knots are made on black wool as a charm for a sprained ankle.
   (4) Promiscuous examples -
   Niobe's children lay nine days in their blood before they were buried.
   Nine buttons of official rank in China.
   Nine of Diamonds (q.v.). The curse of Scotland.
   There are nine mandarins (q.v.).
   Planets. The nine are: (1) Mercury, (2) Venus, (3) Earth, (4) Mars, (5) the Planetoids, (6) Jupiter, (7) Saturn, (8) Uranus, (9) Neptune.
   According to the Ptolemaic system, there were seven planets, the Firmament or the Fixt, and the Crystalline. Above these nine came the Primum Mobile or First Moved, and the Empyrean or abode of Deity.
   The followers of Jaina, a heterodox sect of the Hindus, believe all objects are classed under nine categories (See Jainas.)
   Shakespeare speaks of the “ninth part of a hair.”

“I'll cavil on the ninth part of a hair.”
1 Hen. IV., iii 1