Name	Lifeboat from Titanic	Lifeboat to Carpathia	Confidence Level
Gracie, Mr Colonel Archibald	Collapsible B	12	5.00
Thayer, Mr John Borland Jr	Collapsible B	12	5.00

American Inquiry
Testimony of Charles Lightoller, page 73
   Senator SMITH.  Do you know any of the men who were in the water as you were and who boarded this lifeboat?
    Mr. LIGHTOLLER.   Yes, sir.
    Senator SMITH.  Give their names.
    Mr. LIGHTOLLER.  Mr. Thayer, a first-class passenger; the second Marconi operator - I can tell you his name in a minute - Bride.
    Senator SMITH.  Was that the boat that Col. Gracie -
    Mr. LIGHTOLLER.  Oh, yes; and Col. Gracie.
    Senator SMITH.  Col. Gracie of the United States Army?
    Mr. LIGHTOLLER.  I think I have his card.
    Senator SMITH.  It was Col. Gracie, anyway?
    Mr. LIGHTOLLER.  Col. Gracie was on the upturned boat with me; yes.

American Inquiry
Testimony of Archibald Gracie, page 995-997
    Mr. GRACIE. I saw an upturned boat, and I struck out for that boat, and there I saw what I supposed were members of the crew on this upset boat.  I grabbed the arm of one of them and pulled myself up on this boat.
    Senator SMITH.  Did anybody resist you at all?
    Mr. GRACIE.  What is that?
    Senator SMITH.  Was there any resistance offered? 
    Mr. GRACIE.  Oh, no; none whatever.  I was among the first.  I suppose the boat was then about half full.
    Senator SMITH.  How many were on it?
    Mr. GRACIE.  I suppose there must have been between 15 and 20.
    Senator SMITH.  Was Officer Lightoller on it?
    Mr. GRACIE.  Yes; Officer Lightoller was on that same boat.
    Senator SMITH.  At that time?
    Mr. GRACIE.  At that same time.  Then I came up to the surface and was told by Lightoller what had occurred.  One of the funnels fell from the steamer, and was falling toward him, but when it was going to strike him, young Mr. Thayer, who was also on the same boat, said that it splashed near him, within 15 yards, he said, and it splashed him toward this raft.

     Mr. GRACIE. Lightoller blew his whistle and ordered them to come over and take us off of our upset boat.  "Aye, aye, sir," they replied, and immediately turned toward us, and two boats came right up close and then began the difficult task of a transfer, and some were loaded.  We got on the nearest lifeboat, the bow of this, and some went on this one and some went on the one adjoining.  The complement of the lifeboat I was on was filled up to 65. 
    Senator SMITH.  How many women were there? 
    Mr. GRACIE.  There were a considerable number of women; possibly half the number were women.
    Senator SMITH.  What was the number of that boat, do you know? 
    Mr. GRACIE.  I do not.  I tried to find out what the number of that boat was, but I did not find out what number it was.

    By the time he wrote his book The Truth About the Titanic, Gracie had found out what boat picked him up off of Collapsible B.  He says:
    "My research, particularly the testimony taken before the Senate Committee, establishes the identity of the Titanic lifeboats to which, at day-dawn, we of the upset boat were transferred. These were Boats No. 12 and No. 4. The former [12] was the one that LIghtoller, Barkworth,Thayer, Jr., and myself were In."

Thayer wrote his own account of the Titanic in 1940, The Sinking of the S.S. Titanic.  Therein he states:
  "As I finally came to the surface I put my hand over my head, in order to push away any obstruction.  My hand came against something smooth and firm with rounded shape.  I looked up, and realized that it was the cork fender of one of the collapsible lifeboats, which was floating in the water bottom side up.  About four or five men were clinging to her bottom.  I pulled myself up as far as I could, almost exhausted, but could not get my legs up.  I asked them to give me a hand up, which they readily did.
    About six-thirty, after continued and desperate calling, we attracted the attention of the other lifeboats.  Two of them finally realized the position we were in and drew toward us.  .... It took them ages to cover the three or four hundred yards between us. .... The first took off half of us.  My Mother was in this boat, having rowed most of the night.  She thought she recognized me.  I did not see her.  The other boat took aboard the rest of us.
    We were the last boat to be gathered in. ....  When I reached the top of the ladder, I finally saw my Mother."

The lifeboats he is describing are Collapsible B and #12.  Collapsible B was the overturned boat, and we know his mother was in #12, and we know it was the last boat to reach the Carpathia.

We are positive that Gracie and Thayer climbed onto Collapsible B from the sea, and later transferred to #12.