without fail

These letters she wrote and sent without fail, though she had yet to receive a reply.

It is a fine question, for, as you know, Penelope had not received a single one of those heartfelt and educational letters from the Incorrigible children, even though Mrs. Clarke dropped the envelopes in the post every day without fail, and paid for the stamps out of her own wages, too.

“There might be jam, unless we have run out. But there will be porridge, without fail. After breakfast I will expect you in my office. Children, follow me, please. You will be staying in our guest quarters. The accommodations are humble, but ‘The warmer the welcome, the grander the palace,’ as Agatha Swanburne used to say.”

Had Miss Mortimer meant to imply that Penelope herself was in danger, and that her distinctive hair color had been camouflaged by subjecting the entire student body to the gooey ordeal of the poultice, every six weeks without fail, year after mousy-brown year?

“As I do every single night, without fail,” Lady Constance declared.