From an essay by Emerson on manners:
"The chiefs of savage tribes have distinguished themselves in London and Paris, by the purity of their tournure. "
It is obviously of French origin, but the onlline French dictionaries did not have it. My dictionary and AHD did not have it. But ARTFL Webster 1913 gave :
ournure (Page: 1522)

Tour*nure" (?), n. [F., fr. tourner to turn.]

1. Turn; contour; figure.

2. Any device used by women to expand the skirt of a dress below the waist; a bustle.

But "figure" doesn't seem "le mot juste". "bearing" seems
closer, but I'm not satisfied with it. Let's hear some
suggestions, please.

? mien, stature
?? conduct,

[aside] Never heard of this word before, wwh. Is it now absorbed into english? Reminds me of tourniquet which probably shares the root word with tournure.

My Larousse's paperpack dictionary defines it as follows:

tournure f. turn, direction, course; turning, shape, form, figure

1. (Graceful) manner or bearing; cultivated address.
2. The turning of language or of a phrase; mode of expression. rare.
3. Contour, outline, shape (of a limb, etc.).