--- a
+++ b/files/notes.txt
@@ -0,0 +1,10 @@
+00735	Signals unavailable
+03665	Signals unavailable
+04043	Block 39 is unreadable
+04936	(this was the only record for which signals were previously available)
+05091	Corrected QRS annotations are available (annotator qrsc)
+06453	Recording ends after about 9 hours, 15 minutes
+08378	No start time
+08405	No start time; block 1067 is unreadable
+08434	Blocks 648, 857, and 894 are unreadable
+08455	No start time