Thomas brought Chloe’s old photograph.

Paige carried a disposable camera because she said her sister would have insisted that ordinary moments deserved badly framed pictures.

We walked along the water while the sky changed from gray to pale gold.

At first, none of us spoke about why we were there.

Then Thomas told us that when Chloe was six, she believed waves were created by enormous fish wagging their tails.

She had refused every scientific explanation until she was ten, when she learned enough physics to argue with him using equations.