Yeah, Sheridan could have had other clothes, like a jacket. The jacket could be pre-1964. Transfer from that jacket to a post-1964 tie.

But he lived in Richland, WA in at least '61/'62

That's interesting.

Flyjack, the two versions of the memos from Reno I posted, include the Yuma discussion

"Reno" came from Ground...

I just bought that yellow/brown tie that appears to have the same labelling as the cooper tie, so probably same era

Might be nice for a control.

If Tom was going to do any experiments with "dirt on tie" or a control tie from that era for comparison, I could mail it to 377 and maybe he can give it to Tom at the conference

I'm thinking the fabric might be similar since it's Towncraft 3, and stuff might stick to it in a similar manner

It would be interesting to test Tom's SEM, to see what another random tie from that era accumulated.

One thing I looked at a while ago was: Yttrium and many of the other particles were used for lens coatings..

Including sunglasses...  Is it possible Cooper cleaned his Sunglasses with his tie??

Pure Titanium would make sense at the Hanford site also.

I'm not sure how many time Sheridan was married.
It's at least twice, possibly 3 or even 4.

I believe I've seen his divorce record in Montana

I think the attached marriage record is his first marriage, in Montana.
You can see his father and mother's name is correct on the certificate
Chauncey Peterson and Edith Coffey (it's Coffey..although it looks like Coffee on this doc)
And Sheridan's birth place in Santa Rosa, CA

It looks like Sheridan married Claire Lindgren  on Jan 7, 1956
They lived in Nixon, Montana.

Sheridan was 29, Claire was 28
Note Sheridan is Single (S) on this record. Claire is Divorced (D)
The S and D are cursive. But Single and Divorced are underlined. There is a - in "Number of Marriage" though.

Here is Sheridan Peterson's WWII draft card
1944 thru 1946
On the back they list him then as 6'1", 175 lbs
blue eyes, brown hair, light complexion

Says he has a birthmark in the center of his back.

Discharged 12/16/46

A separate US Marine Corps record shows him mustering in 1945 in San Francisco
Muster Date:   Apr 1945
Rank:   Private
Station:   Headquarters, Second Battalion, Twenty-Fifth Marines, Fourth Marine Division, Fleet Marine Force, C/O Fleet Post Office, San Francisco, California.

Separate phone directory shows him as student at MSU in Missoula, r1110 Vine

History of Marine Corps Air Station Yuma

looks like they had gunnery training there too in 1945?
picture of the base from 1943 attached

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In 1928, the federal government purchased 640 acres (260 ha) near Yuma at the recommendation of Colonel Benjamin F. Fly. Temporary dirt runways were installed for usage by military and civilian planes. It was called Fly Field.

The outbreak of World War II transformed the civilian airport into the Yuma Army Airfield. Construction of facilities began on 1 June 1942 and was activated on 15 December

Yuma AAF was a single-engine flight training school, operated by the Army Air Forces Flying Training Command, West Coast Training Center, later Western Flying Training Command. Flying training began in January 1943. Its training unit was the 307th Single Engine Flying Training Group which operated AT-6 Texans, reporting to the 37th Flying Training Wing. The base operating unit was the 403d Army Air Force Base Unit. In 1944, the unit was upgraded to multi-engine flight training, operating B-26 Marauders.

In addition to the flying training, a Flexible Gunnery School was established at the airfield in November 1943. Flight training was discontinued on 23 April 1945 and gunnery training on 31 May 1945.

The base was closed on 1 November 1945. After the war, the airfield was turned over to the Department of the Interior as a headquarters for the Bureau of Land Reclamation.