diff --git a/emu_war_online_3.myco b/emu_war_online_3.myco
index 3461c60..b8fa012 100644
--- a/emu_war_online_3.myco
+++ b/emu_war_online_3.myco
@@ -12,7 +12,7 @@ Features implemented:
 ** River "simulation" and lakes/rivers.
 *** Physical plausibility isn't real, so the rivers A*-path themselves down to the seas or lakes.
 *** They run from sources at the tallest points with sufficient separation (found greedily).
-*** Terrain near the river centre-line is flooded and eroded somewhat. Valleys don't really work properly due to bad.
+*** Terrain near the river centre-line (source to sink path) is flooded and eroded somewhat. Valleys don't really work properly due to bad.
 ** The world is an island surrounded by ocean.
 * Digging holes (as minor obstruction).
 * Items (dirt, bones).