"The very one!" Mrs. Slawson took her up triumphantly. "The sykeylogical moment! Mrs. Sherman was dead stuck on it. She used to talk to her brother, Mr. Frank Ronald, about the sykeylogical moment, till you’d think it’d stop the clock. Now if you know what a sykeylogical moment is, an’ reco’nize it when it comes along, why, you can take it from me, that’ll be a good chance for you to give the doctor the letters in, but not before." Katherine laughed. "I’m sure you’re right, Mrs. Slawson," she said. "I’ll wait for the psychological moment. And I’ll wash my soiled linen alone, too. You’ve given me a lot of good advice. I’m much, _much_ happier than I was before you came." "Well, good-night then, an’ God bless you!" said Martha, rising. "Now I’ll go back to my—_other_ childern." Halfway between Crewesmere, and the main road, she came to a standstill. "Hello!" exclaimed Dr. Ballard. "What are you doing so far from home at the witching hour of eight o’clock? It looks suspicious. Don’t you think you’d better stand and deliver?" Martha beamed, as she always did at sight of those she liked. "I’ll _stand_, all right, all right, sir, but you can search _me_ for anything to deliver. My husban’ he went to New York this mornin’, an’ before he went, with all my worldly goods I he endowed, accordin’ to Scripture, as Mrs. Peckett says." "Ho! Slawson’s gone to New York, has he?" Dr. Ballard exclaimed. "Well, I’m off for Boston, myself, to-morrow. I’m on my way now to tell—Madam Crewe." Martha nodded. "Certaintly you are. You’ll find Miss Katherine on the back porch, if you hurry. But the ol’ lady makes her close the house at nine sharp, so you’ve not much time to waste on me. Good luck to you, sir. A safe journey, an’ quick return." The doctor chuckled as she left him. "That woman’s a _case_!" he said to himself, but under the stimulus of her suggestion he hurried his steps. "Going to Boston?" Katherine repeated, her brows contracting in a troubled, triangular way which always gave a touching, childlike look to her fine eyes. "Isn’t that rather sudden? You didn’t tell me anything about it this afternoon—down Cherry Lane." "No, I’d not made up my mind then. The resolve came later." "You’ll return?" "Oh, yes. Very soon, if I get what I’m going after. Less soon, if I don’t." Katherine turned her face away. "That sounds mysterious. But I remember you like mysteries." "’Sure I do,’ as Mrs. Slawson would say. I like mysteries for the fun of clearing them up. It’s to clear up a mystery I’m going to Boston." Katherine withheld the question on her lips. "You don’t ask what mystery." "If you wanted me to know, you’d tell me."