--- a/README.1st
+++ b/README.1st
@@ -12,6 +12,16 @@
     (gdb) ecl_print x
     $39 = t_fixnum
     $40 = (ecl_base_char *) 0x42b4000 "10652336"
+
+And another that helps to see a thread state:
+
+    (gdb) ecl_eval "cl:*package*"
+
+Please note that double quotes have to be escaped:
+
+    (gdb) ecl_eval "(concatenate 'string \"a\" \"b\")"
+
+Both will give a string with "readable" content, and a pretty-printed one.