I think the meaning is more like "fell into the river" in English, as "fall to" sounds like either a direction or (rarely) a defeat in battle.
Should have been the ring fell into the river (LOTR anyone)
הַשַּׁרְבִיט נָפַל לַנָּהָר.
. שרבית also means scepter. This should have been accepter
אני מכיר. הֶפְסֵד גָּדוֹל... :-)
Glad to hear it.