February 16 Tuesday – Sam wrote from Titusville, Pennsylvania to Livy the next day that he had:
…sat up until 2 in the morning (because no porter at hotel to call me,) & returned on a coal train to Ravenna—went to bed for one hour & a half & then got up half asleep & started in the early train for this Titusville section of country—had to wait from 1 P.M. till 5, at Corry, Pa., & so found an excellent hotel & went to bed… [MTL 3: 103-4].
Sam gave his “Vandals” lecture at Corinthian Hall in Titusville, Pennsylvania [MTPO].

February 15 Monday – Sam wrote in the morning from Ravenna, Ohio to Livy about having her engagement ring made. He left Ravenna “about noon” and that evening gave his “Vandals” lecture in Alliance, Ohio.

February 14 Sunday – Sam responded from Ravenna, Ohio to Elisha Bliss’ letter of Feb. 10, which he’d received while in Elmira. Sam wanted to handle all details of revision on the proofs, having learned the lesson of neglecting this step with his Jumping Frog book. He wrote Bliss that he expected to be in Hartford two or three weeks starting the last week of February. Sam also wrote Twichell and answered General Joseph R. Hawley’s (1826-1905) letter of Feb. 10 about Sam’s desire to buy into the Hartford Courant. Hawley and Charles Dudley Warner (1829- 1900) ran the Courant.

February 13 Saturday – Sam wrote from Cleveland to Livy. “(10AM) I have been here two hours in a splendid state of exasperation. I went to bed in the cars at half past nine, last night & slept like a log until 7 this morning, & woke up thoroughly refreshed” [MTL 3: 88].
He discovered that he’d missed a lecture date in Alliance, Ohio made by Abel Fairbanks, a date unknown to Sam. That evening Sam gave his “Vandals” lecture in Ravenna, Ohio.
Sam wrote letters from Ravenna that evening including this to Livy:

February 12 Friday – Sam left Elmira “at the last minute” that evening and slept overnight on the train back to Cleveland.

February 10 Wednesday – Elisha Bliss wrote from Hartford to Sam about the proofs for Innocents Abroad. He had none to send but was “pushing things now very rapidly however” [MTL 3: 98-9]. Sam most likely received the letter on Feb. 11 or 12.

February 5 Friday – Sam wrote from Elmira to his mother and family, informing them that he was:
“…duly & solemnly & irrevocably engaged to be married to Miss Olivia L. Langdon, aged 23 ½, only daughter of Jervis and Olivia Langdon of Elmira, New York. Amen.”
Sam told the family of his possible purchase of a part interest in the Cleveland Herald, that the marriage with Livy might take a “good while” as he was not yet “rich enough,” and of Livy setting:

February 4 Thursday – Sam arrived in Elmira. Jervis Langdon gave his approval for Sam and Livy’s engagement.

February 2 Tuesday – Sam left Cleveland for Elmira and Livy. He’d received some interest from George A. Benedict, who was ill, in the sale of part interest in the Cleveland Herald for $25,000.

February 1 Monday – Sam gave his “Vandals” lecture at Strawn’s Hall in Jacksonville, Illinois [MTPO].
Afterwards he wrote Francis Bliss a short note, saying he would be in Elmira from Feb. 3 till Feb. 11 and asking for proofs of Innocents Abroad to be sent there if ready. Proofs were not sent until early March, when Sam was in Hartford [MTP].