[See #39 for #41’s dramatic context; as noted by Cooke, #41’s Embryo first appears earlier in R.2 in the following two key contexts:]
“Loge: [to Wotan and the gods] … the Nibelung, Night-Alberich, (#4) wooed in vain for the nixies’ favours; the thief robbed (#12) the Rhinegold then in revenge: (#19) it seems to him now the rarest jewel, (#37?) greater than woman’s grace. (#13>#41 Embryo) For the glittering toy that was torn from the deep the daughters’ lament rang out: to you, Wotan, they now appeal to call the thief to account (with increasing warmth: #12) and give back the gold to the waters, to remain their own (#12) forever.”
“Fricka: (softly to Loge) Might the golden trinket’s glittering gem be worn by women and serve as fair adornment?
Loge: A wife might ensure that her husband was true (#23) if she lovingly wore the bright-shining jewel, (#13>#41) which, shimmering, dwarfs have forged, bestirred by the spell of the Ring.”
[[#42]] The Wondrous “Tarnhelm” (man’s imagination)
The Tarnhelm, Wagner’s metaphor for that special product of the power of the human mind (the Ring), the imagination, initially served Alberich’s quest for Worldly power, but was co-opted by Wotan and the gods, with the aid of Loge’s cunning, to create and sustain the illusions which are the basis for religious belief, the basis for the gods’ rule over men’s hearts
(#42 based on #35; basis of #43 and #154; related to #48)
[Made by Mime to Alberich's specifications, it can, as we see below at its inception, make one invisible. We learn later in R.3 that with its magic one can transform one form into another (including one's own form), and in T.1.2 we learn that it can transport one instantly from one place to another:]
“(#7: Alberich drags the screeching Mime by his ears from a side gallery.) (…)
Alberich: You'll be properly pinched if you don't finish making the delicate jewel on time, as I ordered. (...)
Mime: (Howling: #5>>; #6>>) Just let me go! It's already finished, just as you asked; with sweat and toil it was fitted together ... .
[Mime makes various excuses, which Alberich contemptuously rejects.]