“…Although this would not agree with the parallel shift in Frisian, it would agree with the distribution of the umlauted vowels in Primitive Old English, where * i and * j generally remain, as against the position in the written period, where * i and *j largely disappear or are reduced, creating the environments for phonemic as opposed to allophonic contrast. But this type of approach is ruled out of court by Penzl(1947), who shows that the palatal consonants only became phonemic by virtue of the phonemicization of umlaut. In any case, it is difficult to see how the umlaut of, for example, */a:/ could have resulted in anything other than Is:/ immediately, since the phonetic change was [a:] 7 [ae:].…”