"look of being committed to nothing in particular" - a facial description from Henry James's The American

A description of a face from The American by Henry James.

This is from the revised New York Edition published in 1908

His complexion was brown and the arch of his nose bold and well-marked. His eye was of a clear, cold grey, and save for the abundant droop of his moustache he spoke, as to cheek and chin, of the joy of the matutinal steel. He had the flat jaw and the firm, dry neck which are frequent in the American type; but the betrayal of native conditions is a matter of expression even more than of feature, and it was in this respect that our traveller's countenance was supremely eloquent. The observer we have been supposing might, however, perfectly have measured its expressiveness and yet have been at a loss for names and terms to fit it. It had that paucity of detail which is yet not emptiness, that blankness which is not simplicity, that look of being committed to nothing in particular, of standing in a posture of general hospitality to the chances of life, of being very much at one's own disposal, characteristic of American faces of the clear strain. It was the eye, in this case, that chiefly told the story; an eye in which the unacquainted and the expert were singularly blended. It was full of contradictory suggestions; and though it was by no means the glowing orb of a hero of romance you could find in it almost anything you looked for. Frigid and yet friendly, frank yet cautious, shrewd yet credulous, positive yet sceptical, confident yet shy, extremely intelligent and extremely good-humoured, there was something vaguely defiant in its concessions and something profoundly reassuring in its reserve. The wide yet partly folded wings of this gentleman's moustache, with the two premature wrinkles in the cheek above it, and the fashion of his garments, in which an exposed shirt-front and a blue satin necktie of too light a shade played perhaps an obtrusive part, completed the elements of his identity. 

Same passage from the original version published in 1877

His complexion was brown, and his nose had a bold well-marked arch. His eye was of a clear, cold gray, and save for a rather abundant moustache he was clean-shaved. He had the flat jaw and sinewy neck which are frequent in the American type; but the traces of national origin are a matter of expression even more than of feature, and it was in this respect that our friend’s countenance was supremely eloquent. The discriminating observer we have been supposing might, however, perfectly have measured its expressiveness, and yet have been at a loss to describe it. It had that typical vagueness which is not vacuity, that blankness which is not simplicity, that look of being committed to nothing in particular, of standing in an attitude of general hospitality to the chances of life, of being very much at one’s own disposal so characteristic of many American faces. It was our friend’s eye that chiefly told his story; an eye in which innocence and experience were singularly blended. It was full of contradictory suggestions, and though it was by no means the glowing orb of a hero of romance, you could find in it almost anything you looked for. Frigid and yet friendly, frank yet cautious, shrewd yet credulous, positive yet sceptical, confident yet shy, extremely intelligent and extremely good-humored, there was something vaguely defiant in its concessions, and something profoundly reassuring in its reserve. The cut of this gentleman’s moustache, with the two premature wrinkles in the cheek above it, and the fashion of his garments, in which an exposed shirt-front and a cerulean cravat played perhaps an obtrusive part, completed the conditions of his identity.