Triple fff quiz

[sheffield hatter]

Summer is acumen may be a reference to "Summer is a coming in", a very, very old folk song.

Yes, here are the lyrics in Middle English:

Sumer is icumen in
Lhude sing cuccu
Groweþ sed
and bloweþ med
and springþ þe wde nu
Sing cuccu

Awe bleteþ after lomb
lhouþ after calue cu
Bulluc sterteþ
bucke uerteþ
murie sing cuccu

Cuccu cuccu
Wel singes þu cuccu
ne swik þu nauer nu

Sing cuccu nu • Sing cuccu.
Sing cuccu • Sing cuccu nu

(Some of the Us are equivalent to Vs; þ = TH)