Hour Comments on Report

Many of our resources put a comment on their hour entries (using the comment in the update stream, not the note/description field from the timesheet or time entry page).  They look something like this:

I'm trying to pull in that comment into a report.  I've done this before with tasks and issues using "task:lastNote:noteText" and "opTask:lastNote:noteText".  I have tried "lastNote:noteText" on an hour report and "hour:lastNote:noteText", but neither work.  Does anyone have a suggestion for what field I can pull to get this data into my report?