Appraisal — Evaluating the worth of an object based on its materials, the artistic interpretation and the breeding of the artist.
Concealment — Hiding secret letters, or discovering where they might be hidden.
Cryptography — Letter substitution codes are all the rage. With this skill you can attempt to convert them back into the French.
Deduction — You know, on reflection, considering their state of undress, I don't really think that was his visiting niece.
Demolitions — Remember, remember the fifth of November, The gunpowder, treason and plot, I know of no reason why gunpowder treason Should ever be forgot.
Disguise — With the use of the correct wig, false nose, and sufficient padding you may appear like another courtier.
Forgery — Imitating someone else's hand in personal letters or for signatures.
Gambling — The skill to use so as not to immediately destitute yourself when playing at cards or dice.
Language — Non-French languages as spoken in less civilised courts. Specify which language you wish to know. Multiple languages can be learnt. You should also use this skill for the classical languages of Latin and Greek for which most educated persons are familiar.
Lipreading — Understanding most of a conversation from across the room merely by observing the lip movements of those present.
Mechanics — Being able to understand or even repair these new mechanical devices.
Mimicry — Imitating another person's mannerisms or voice.
Navigation — Determining where you are and how to get to other places using the stars or landmarks.
Medicine — How the various humors of the body and the alignments of the stars cause this person to have a headache and the chewing of willow bark to be efficacious.
Professional Skill — Define a general skill for your profession that isn't listed separately. Such as fishing, farming, scribe etc.
Shadowing — Following someone without them being aware of you.
Survival — Being able to live off the land, mostly through poaching.
Tactics — Knowing how quickly musketeers can walk, and how quickly concentrated musket fire will reduce their ranks.
Tracking — Being able to follow a fleeing person who is incautious of their trail.