#006 かささぎの

かささぎの
渡せる橋に
おく霜の
白きを見れば
夜ぞ更けにける

kasasagi no wataseru hashi ni oku shimo no shiroki o mireba yo zo fuke ni keru

Otomo no Yakamochi

we can cross the Bridge of Magpies when we see frost pure white upon it the night has nearly passed (trans. Köy Deli )

when crossing the Bridge of Magpies a deposit of frost is seen as pure white the night has grown late  (trans. Jane Reichhold)

Parsing 

kasasagi no
magpies | of
wataseru hashi ni
can be passed | bridge | locative particle
oku shimo no
deposit | frost | of
shiroki o mireba
white | accusative particle | time-when see 
yo zo fuke ni keru
night | emphatic particle | has grown late

(Tentative) Crib
When I see white frost on Magpie Bridge/(on the magpies that can be crossed as a bridge?), night has grown late.

kasasagi	かささぎ	Magpie(s)		6
wataseru	渡せる	(that can be) passed, crossed, ferried		6
hashi	橋	bridge		6
shimo	霜	frost		6
oku	おく or 置く	To put, place, set, deposit		6
Fuke ni keru	更けにける	to grow late		6
Yo	夜	night		6
Shiroki	白き	White (ness), pure		6