Complex sentence: Eventually one was invented in 1564 by Giovan Battista Bellaso using a "reciprocal table" with five alphabets of his invention and another form was described in 1586 by Blaise de Vigenère with a similar reciprocal table of ten alphabets.
Split into simpler sentences: Eventually one was invented in 1564 by Giovan Battista Bellaso using a "reciprocal table" with five alphabets of his invention. Another form was described in 1586 by Blaise de Vigenère with a similar reciprocal table of ten alphabets.