Susy, in her biography, mentions that her father at this time read to them a little article which he had just written, entitled “Luck,” and that they thought it very good. It was a story which Twichell had heard and told to Clemens, who set it down about as it came to him. It was supposed to be true, yet Clemens seemed to think it too improbable for literature and laid it away for a number of years. We shall hear of it again by and by.

From Susy's memoranda we gather that humanity at this time was to be healed of all evils and sorrows through “mind cure.”

Papa has been very much interested of late in the “mind-cure”
theory. And, in fact, so have we all. A young lady in town has
worked wonders by using the “mind cure” upon people; she is
constantly busy now curing peoples' diseases in this way—and curing
her own, even, which to me seems the most remarkable of all.
A little while past papa was delighted with the knowledge of what he
thought the best way of curing a cold, which was by starving it.
This starving did work beautifully, and freed him from a great many
severe colds. Now he says it wasn't the starving that helped his
colds, but the trust in the starving, the “mind cure” connected with
the starving.
I shouldn't wonder if we finally became firm believers in “mind
cure.” The next time papa has a cold I haven't a doubt he will send
for Miss Holden, the young lady who is doctoring in the “mind-cure”
theory, to cure him of it.

Again, a month later, she writes:

April 19, 1886. Yes, the “mind cure” does seem to be working
wonderfully. Papa, who has been using glasses now for more than a
year, has laid them off entirely. And my near-sightedness is really
getting better. It seems marvelous. When Jean has stomack-ache
Clara and I have tried to divert her by telling her to lie on her
side and try “mind cure.” The novelty of it has made her willing to
try it, and then Clara and I would exclaim about how wonderful it
was she was getting better. And she would think it realy was
finally, and stop crying, to our delight.
The other day mama went into the library and found her lying on the
sofa with her back toward the door. She said, “Why, Jean, what's
the matter? Don't you feel well?” Jean said that she had a little
stomack-ache, and so thought she would lie down. Mama said, “Why
don't you try 'mind cure'?” “I am,” Jean answered.

Howells and Twichell were invited to try the “mind cure,” as were all other friends who happened along. To the end of his days Clemens would always have some panacea to offer to allay human distress. It was a good trait, when all is said, for it had its root in his humanity. The “mind cure” did not provide all the substance of things hoped for, though he always allowed for it a wide efficacy. Once, in later years, commenting on Susy's record, he said:

The mind cannot heal broken bones, and doubtless there are many
other physical ills which it cannot heal, but it can greatly help to
modify the severities of all of them without exception, and there
are mental and nervous ailments which it can wholly heal without the
help of physician or surgeon.

Susy records another burning interest of this time:

Clara sprained her ankle a little while ago by running into a tree
when coasting, and while she was unable to walk with it she played
solotaire with cards a great deal. While Clara was sick and papa
saw her play solotaire so much he got very much interested in the
game, and finally began to play it himself a little; then Jean took
it up, and at last mama even played it occasionally; Jean's and
papa's love for it rapidly increased, and now Jean brings the cards
every night to the table and papa and mama help her play, and before
dinner is at an end papa has gotten a separate pack of cards and is
playing alone, with great interest. Mama and Clara next are made
subject to the contagious solotaire, and there are four
solotarireans at the table, while you hear nothing but “Fill up the
place,” etc. It is dreadful!

But a little further along Susy presents her chief subject more seriously. He is not altogether absorbed with “mind cure” and solitaire, or even with making humorous tales.