It is neither fair nor dark, but of a dull-brown colour, lighter around the mouth, where it has been bleached by the sun, "ambeer," and water.    From Wordnik.com.  [The Scalp Hunters] Reference

There was a gravity in his look, but that was not from any gravity of spirits; it was his swarth complexion that gave him this appearance, aided, no doubt, by several lines of "ambeer" proceeding from the corners of his mouth in the direction of the chin.    From Wordnik.com.  [The Hunters' Feast Conversations Around the Camp Fire] Reference

From a corner of his mouth trickled ‘ambeer.’.    From Wordnik.com.  [THE AMERICAN WEST] Reference