What is the meaning of thence?

adverb

• From that place or from there.
  • usage: "proceeded thence directly to college"; "flew to Helsinki and thence to Moscow"; "roads that lead therefrom"
  • synonyms: therefrom
• From that circumstance or source.
  • usage: "atomic formulas and all compounds thence constructible- W. V. Quine; "a natural conclusion follows thence"; "public interest and a policy deriving therefrom"; "typhus fever results therefrom"
  • synonyms: therefrom, thereof
• Used to introduce a logical conclusion. ( from that fact or reason or as a result)
  • usage: "therefore X must be true"; "the eggs were fresh and hence satisfactory"; "we were young and thence optimistic"; "it is late and thus we must go"; "the witness is biased and so cannot be trusted"
  • synonyms: therefore, hence, thus, so