More than a century old too by the smell of them.

By the look and smell of it, he had been there some weeks.

"I mean, could any one tell you were English by your smell?"

You can tell that someone has been working with them just by the smell of the hands or clothes.

By the smell of it, the meat had gone pretty high.

I can tell a fake picture by the smell of its oil.

And by the smell, she knew it did not contain water.

He had not recovered enough to be able to tell by smell.

She too could place him readily by smell and sound.

I was starting to tell these people apart by their smell.