What case is the inverse of the dative?

In the sentence, "Sally gave the book TO JOHN", "to John" would use the
dative case as it marks the recipient. I want a case that marks the giver,
as in "John got the book FROM SALLY."

I have been looking for a long time, and have not found a natlang with such
a case. If I were to create one, what would be equivalent to the Latin
phrase "the case appropriate for giving", "casus dativus"? I am thinking
"casus accivus", which would make this the accive case.

Thoughts?

Gregory Gadow
techbear@serv.net

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