Updates regarding UPenn tree

[Robert Orr]

Gaelic has an f/zero alternation (f/fh orthographically), and also what
looks like an  s/f alternation (Lenited IE *sw develops to Goidelic f
(non-lenited sw becomes s) and Welsh chw (there are not many examples, and
these are often obscured by subsequent sound chnages and levellings).

Gaelic f is actually a development of Indo-European *w in non-lenited
position (lenited *w develops to zero).  cf. fear/fhear (< IE wir-);
Brythonic  develops IE *w to g(w) in non-lenited position, cf. Welsh gwr (<
IE *wir-).

These would completely independent of the hw > f sound change in Buchan,
Banff, etc., discussed earlier.  (by the way, "where" in North-East Scots
would be "far" or "faur"; Scottish Gaelic "far" - "where" is not related, it
is a development of "de bharr (barr)"

Robert Orr