He made an excited movement toward his door, and his hand actually trembled as he opened it.

Eliza was usually about the passages at this time of day.

He called her name.
She put her head over the upper bannister.
"Come down and see Lazarus Cameron!" "I'll come in a minute." He saw through the railing of the bannisters the movement of some linen she was folding.
"He'll be past in a minute." Harkness's voice betrayed his excitement more than he desired.
Eliza dropped the linen and came downstairs rather quickly.

Harkness returned to his window; she came up beside him.

The inner window was open, only one pane was between them and the outer air.