The missing grace notes opening the trill are almost certainly Kolberg's mistake, who interpreted them as a 
. This version was copied in CB and EL, yet Balakirev omitted the , completely superfluous in this context (on the crossed-out first version of the last page of CB, one can see that the Russian composer started writing this , yet after putting the first vertical line, he realised that it was pointless here and abandoned it).
Compare the passage in the sources »
category imprint: Differences between sources
issues: Errors in CK
notation: Ornaments