diff --git a/README.md b/README.md
index dda55f4..85f6d03 100644
--- a/README.md
+++ b/README.md
@@ -144,9 +144,10 @@ fields:
 
 Each report carries only the samples no earlier report has delivered. A sample
 waits only as long as the history holds it: the last 100 rounds of each host.
-Nothing is sent while the page is paused. A report with no answer after 30
-seconds is abandoned, and its samples go in the next one. So a server that
-stored them but answered late gets them twice.
+The samples an interval change clears wait apart, the last 100 of each host,
+until they are delivered. Nothing is sent while the page is paused. A report
+with no answer after 30 seconds is abandoned, and its samples go in the next
+one. So a server that stored them but answered late gets them twice.
 
 A failed delivery is quiet, as on a static file host with no backend: one debug
 log line when deliveries start failing, one when they recover. The checks go on.