How do you understand "quick parts"?

The whole sentence are:
"Mr. Bennet was so odd a mixture of quick parts, sarcastic humour, reserve, and caprice, that the experience of three and twenty years had been insufficient to make his wife understand his character."

"Quick parts" reminds me of "quick-witted", "the experience of three and twenty years" would be "twenty-three year's experience"?

Not sure if I really understood this sentence.

Question

How do you understand "quick parts"?

The whole sentence are:
"Mr. Bennet was so odd a mixture of quick parts, sarcastic humour, reserve, and caprice, that the experience of three and twenty years had been insufficient to make his wife understand his character."

"Quick parts" reminds me of "quick-witted", "the experience of three and twenty years" would be "twenty-three year's experience"?

Not sure if I really understood this sentence.

Answer

I pretty much live for old books and I couldn't give you an actual definition for 'quick parts'. You can search for specific phrases in some dictionaries/databases, but that one is definitely long gone from common parlance. I'd say you've got the sense of it.

Twenty-three - yep.

Great book.

Answer

I agree with Matthew - this is not a normal in modern English.  You just sort of guess what it means from the context.

Answer

Hello,
Thank you for asking sunch an interesting question. I too have wondered about the meaning of the term "quick parts". So I did some research and here is what I found. 
Quick parts is listed as a synonym for buth 'acumen' and acuteness. [1] It could also mean 'visible' as illustrated in this example "The effects which are the most rapid and most persistant, are the many deteriorations of the horn and quick parts of the hoof."[2]. It is also translated as 'd'esprit' [3] and un ingégno svegliato (a man of quick parts)[4] in French and Italian respectively.

In conclusion, you are correct. 'Quick parts' means acute, perceptive, and ingenious.
Sources
1. 'A Dictionary of English Synonymes and Synonymous Or Parallel Expressions' by Richard Soule,
2. Volume 8 of Wallace's Monthly
3. The Standard Pronouncing Dictionary of the French and English Languages by Alexander Spiers and Gabriel Surenne
4. New Pronouncing and Explanatory English-Italian and Italian-English Dictionary by John Millhouse