The Silver Age is the second of five plays drawn together as a sequence by Thomas Heywood some time shortly after 1613.
The huge boar's head with which Hercules entertains the centaurs in the Silver Age reappears in the Brazen Age in the Meleager story; while Cerberus's three heads and the lion's head in the Silver Age reappear as trophies in Brazen Age.
8) Despite the wide acceptance of this argument, closer inspection reveals that the two plays about Hercules cannot be derived from the poem since it does not deal in large areas of their subject matter, except in the briefest outline, including Jupiter's seductions of Alcmena and Semele, and Hercules' birth in The Silver Age, the Achelous / Deineira / Nesus story, and Hercules' madness and death, nor the stories of Venus coupling with Adonis and Mars in The Brazen Age.
16) Most especially it is the evident association of I Hercules at its first performance on May 7, 1595 at the Rose with the only known installation of flying equipment, Henslowe's "throne In the heuenes" during Lent of that year, which makes further attention to the auspices of The Silver Age a matter of considerable interest.
32) The auspices of Alphonsus, however, are nearly as complicated as those of The Silver Age.
42) Thus we have the conjunction on May 7, 1595 of the one piece of evidence for flying equipment (if that is what is meant by "the throne In the heuenes"), and the one play that makes substantial use of it, if 1 Hercules is accepted to be an earlier version of The Silver Age.
Most indicative of such problems, however, is not so much the evidence of flying in The Silver Age but of its absence where it might be expected.