This is both so sad and so sweet. I can just picture a very cute slumbering Baby Legolas on his shoulder. And thank goodness Thranduil has him to care for, I'm sure it aided his healing immensely.

"Elrond wondered why it was they all seemed destined for such tragedy. Was there anywhere in Arda where it was not so?"

I don't think there is anywhere it isn't so at some point in time, but there are also always the times stretching in between the tragedies.  I guess if you live that long you're inevitably going to experience more of both grief and joy. 

A lovely glimpse into the companionship between these two.