गूफ़

Sylvia having tea, both women are delicately sipping at the edge of their cups, next scene and subsequent views shows no visible liquid well into the ornament cups.

Mr Tietjens takes a matchbox to light a fire in the fireplace. The matchbox is cardboard, this type of cardboard didn't get into general production till the 1930s. As the scene takes place in 1918, the box should be wood.