Giddon eyed her long hair thoughtfully, but said nothing.
Karataev smiled thoughtfully and was silent awhile looking at the pieces.
Some walked thoughtfully up and down, others whispered and laughed.
He turned to the stove, pouring himself another cup of coffee and leaned against the counter, watching her thoughtfully as he sipped the coffee.
His experimental investigations are carried out with plain and usually home-made apparatus, the accessories being crude and rough, but the essentials thoughtfully designed so as to compass in the simplest and most perfect manner the special end in view.