The hymn Crux fidelis inter omnes (Cantus ID g00959) displays strong similarities with the melodic lines of T and C:

1--d---e--gh--hg--h--k--kj---hg---j--k--lm---hg---k--jh--h---4

"Crux fidelis inter omnes / arbor una nobilis

1--h--hkj---g---ge--f--dc--de--efe---d---dh---hg---ed--f--ed---d--4

nulla tamen silva profert / fronde flore germine." (GT 182)