Things did not need to be explained.
It provided Colina with a good opportunity to retire.

She rose.
Ambrose's face fell absurdly.

"Must you go ?" he said.
"I suppose I will meet you officially--later," she said.
He raised a pair of perplexed eyes to her face.

"I never thought about an introduction," he said quite humbly.

"You see we never had any ladies up here." In the light of his uncertainty Colina felt more assured.