Who said "I have a great deal to tell you that you do not expect"?

This quote is attributed to Great-Expectations Jaggers.

I have a great deal to tell you that you do not expect - Great-Expectations Jaggers

"I have a great deal to tell you that you do not expect"

Great-Expectations Jaggers

Character in Great Expectations

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"There are some things that I must not tell you; but I may make a guess, and so may you."

"It may be that you will get some news of your patron."

"It is a capital mistake to theorize before one has data."

"It is of the utmost importance that you not tell a soul."