To come and let him know.

To let him know at once.

He made the promise so frankly and so repetitiously, and with such evident consciousness of his own ability and readiness to meet his debt to Albert on demand, that the latter went away to his claim in quietness and hopefulness, relying on Miss Marlay to stand guard over his sister's love affairs in his absence.
But standing guard was not of much avail.

All of the currents that flowed about Katy's life were undermining her resolution not to see Smith Westcott.

Katy, loving, sweet, tenderhearted, was far from being a martyr, in stubbornness at best; her resolutions were not worth much against her sympathies.