Tacitus reports, that amongst certain barbarian kings their manner was, when they would make a firm obligation, to join their right hands close to one another, and intertwist their thumbs; and when, by force of straining the blood, it appeared in the ends, they lightly pricked them with some sharp instrument, and mutually sucked them.
       Physicians say that the thumbs are the master fingers of the hand, and that their Latin etymology is derived from "pollere." The Greeks called them 'Avtixeip', as who should say, another hand. And it seems that the Latins also sometimes take it in this sense for the whole hand:
       "Sed nec vocibus excitata blandis,
       Molli pollici nec rogata, surgit."
       ["Neither to be excited by soft words or by the thumb."
       --Mart., xii. 98, 8.]
       It was at Rome a signification of favour to depress and turn in the thumbs:
       "Fautor utroque tuum laudabit pollice ludum:"
       ["Thy patron will applaud thy sport with both thumbs"
       --Horace.]
       and of disfavour to elevate and thrust them outward:
       "Converso pollice vulgi,
       Quemlibet occidunt populariter."
       ["The populace, with inverted thumbs, kill all that
       come before them."--Juvenal, iii. 36]
       The Romans exempted from war all such as were maimed in the thumbs, as having no more sufficient strength to hold their weapons. Augustus confiscated the estate of a Roman knight who had maliciously cut off the thumbs of two young children he had, to excuse them from going into the armies; and, before him, the Senate, in the time of the Italic war, had condemned Caius Vatienus to perpetual imprisonment, and confiscated all his goods, for having purposely cut off the thumb of his left hand, to exempt himself from that expedition. Some one, I have forgotten who, having won a naval battle, cut off the thumbs of all his vanquished enemies, to render them incapable of fighting and of handling the oar. The Athenians also caused the thumbs of the AEginatans to be cut off, to deprive them of the superiority in the art of navigation.
       In Lacedaemon, pedagogues chastised their scholars by biting their thumbs.
       [The end]
       Montaigne's essay: Of Thumbs

Against Idleness
All Things Have Their Season
The Ceremony Of The Interview Of Princes
A Consideration Upon Cicero
Cowardice The Mother Of Cruelty
A Custom Of The Isle Of Cea
Defence Of Seneca And Plutarch
The Letters Of Montaigne
Nine And Twenty Sonnets Of Estienne De La Boitie
Not To Communicate A Man's Honour
Not To Counterfeit Being Sick
Observation On The Means To Carry On A War According To Julius Caesar
Of A Monstrous Child
Of A Saying Of Caesar
Of Age
Of Ancient Customs
Of Anger
Of Books
Of Cannibals
Of Cato The Younger
Of Coaches
Of Conscience
Of Constancy
Of Cripples
Of Cruelty
Of Custom, And That We Should Not Easily Change A Law Received
Of Democritus And Heraclitus
Of Diversion
Of Drunkenness
Of Experience
Of Fear
Of Friendship
Of Giving The Lie
Of Glory
Of Idleness
Of Ill Means Employed To A Good End
Of Judging Of The Death Of Another
Of Liars
Of Liberty Of Conscience
Of Managing the Will
Of Moderation
Of Names
Of One Defect In Our Government
Of Pedantry
Of Physiognomy
Of Posting
Of Prayers
Of Presumption
Of Profit And Honesty
Of Prognostications
Of Quick Or Slow Speech
Of Recompenses Of Honour
Of Repentance
Of Sleep
Of Smells
Of Solitude
Of Sorrow
Of Sumptuary Laws
Of The Affection Of Fathers To Their Children
Of The Arms Of The Parthians
Of the Art of Conference
Of The Battle Of Dreux
Of The Custom Of Wearing Clothes
Of The Education Of Children
Of The Force Of Imagination
Of The Inconstancy Of Our Actions
Of The Inconvenience Of Greatness
Of The Inequality Amongst Us
Of The Most Excellent Men
Of The Parsimony Of The Ancients
Of The Punishment Of Cowardice
Of The Resemblance Of Children To Their Fathers
Of The Roman Grandeur
Of The Uncertainty Of Our Judgment
Of The Vanity Of Words
Of Three Commerces
Of Three Good Women
Of Thumbs
Of Vain Subtleties
Of Vanity
Of Virtue
Of War Horses, Or Destriers
A Proceeding Of Some Ambassadors
The Story Of Spurina
That A Man Is Soberly To Judge Of The Divine Ordinances
That Fortune Is Oftentimes Observed To Act By The Rule Of Reason
That It Is Folly To Measure Truth And Error By Our Own Capacity
That Men Are Justly Punished For Being Obstinate In The Defence Of A Fort
That Men Are Not To Judge Of Our Happiness Till After Death
That Men By Various Ways Arrive At The Same End
That Our Affections Carry Themselves Beyond Us
That Our Desires Are Augmented By Difficulty
That Our Mind Hinders Itself
That The Hour Of Parley Is Dangerous
That The Intention Is Judge Of Our Actions
That The Profit Of One Man Is The Damage Of Another
That The Relish For Good And Evil Depends In Great Measure Upon The Opinion
That The Soul Expends Its Passions Upon False Objects, Where The True Are Wantin
That To Study Philosophy Is To Learn To Die
That We Are To Avoid Pleasures, Even At The Expense Of Life
That We Laugh And Cry For The Same Thing
That We Taste Nothing Pure
To-Morrow's A New Day
Upon Some Verses Of Virgil
Use Makes Perfect
Various Events From The Same Counsel
Whether The Governor Of A Place Besieged Ought Himself To Go Out To Parley