Analysis of information sources in references of the Wikipedia article "Cirth" in English language version.
⟨q⟩ (⟨kw⟩) consists of a lip-rounded k̊ followed by a partly unvoiced w-offglide (more marked medially than initially).
⟨gw⟩ which only occurs in the medial group ⟨ngw⟩ is the voiced counterpart: a lip-rounded ɡ̊ followed by a w-offglide.
But he knew the old sign for 'nasal ṽ' and sometimes represents this (espec. where it is an initial variant on m) by ⟨mh⟩.
⟨ty⟩ is pronounced as a 'front explosive' [c], as e.g. Hungarian ty; but it is followed by an appreciable partly unvoiced y-offglide.
⟨dy⟩ was formerly the voiced counterpart [ɟ] followed by a y-offglide.
⟨hy⟩ is an audibly spirant voiceless y, that is approximately [ç] as ch in German ich.
⟨dy⟩ ... only occurred in the group ⟨ndy⟩, which has become simplified to ⟨ny⟩.
n in ⟨ny⟩ is 'palatal n' but followed by (cf. ⟨ty⟩) a y-offglide, more marked medially (where ⟨ny⟩ counts as a group), less so initially).
ñwalme > nwalme. Only used for initial ⟨nw⟩, which developed from ⟨ñw⟩. Other occurrences of ⟨nw⟩ (originating in ⟨n⟩ + ⟨w⟩) are written númen + vilya.
The runic alphabet used on Thror's Map and elsewhere in The Hobbit is not the Angerthas, but is rather the futhorc used by the Anglo-Saxons in England over a thousand years ago, adapted by Tolkien for the representation of modern English.
