Traces Remain title page
... but what counts as survival?"
by Geoff Chaplin
"the sudden presence, the glimpse behind the curtain, the episode measured in minutes and preserved across the centuries"
from the preface of 'Traces Remain' by Charles Nicholl.
Also the title of a modern classical orchestral work by Colin Matthews in which he incorporates
"a sketched passage from Mahlers unfinished Tenth Symphony, material from Sibelius lost Eight Symphony"
and other fragments.