In which 1872 publication did Charles Darwin lay the conceptual groundwork for emotion analysis?

Answer

The Expression of the Emotions in Man and Animals.

Darwin presented his arguments regarding the evolutionary roots of emotional expressions in his 1872 publication, The Expression of the Emotions in Man and Animals.

In which 1872 publication did Charles Darwin lay the conceptual groundwork for emotion analysis?
inventiontechnologyrecognitionpsychologyemotion