I cannot understand this paragraph, could someone translate it?
Iam vero telam nobis nobis (ut aiunt) exordientibus, prius de ipsius memoriae definitione, et qua parte corporis eius sedes collocata, de eius artis inventoribus paucis disserendum esse censemus quo circa qantum ad rem attinet sucinctim et breviter omnia enucleabimus.

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What is the source of this text? It has some typos and seems to be incomplete. I could translate it but need to know the context and correct spellings.