Your answer is Mrs. A. L. HERRING was listed as Jessie P. on the 1940 US Federal Census. Her husband was listed as Albert L HERRING. They were both listed as born in Illinois. Albert is listed as a "Grain buyer" and Jessie doesn't have an occupation listed. Albert is age 62 and Jessie is age 61. Both had completed the 4th year of high school. It looks like their address was 2106 SE 89th (or 87th).
Source: 1940 US Federal Census, Election Precinct 404 Kelly, Multnomah County, Oregon, Sheet 61A, stamped page number 197. Census date: 9 April 1941.
On the 1940 Census, they said they had lived in the same house in 1935. I checked the Polk's Portland City Directories that were available to me (1936, 1937, 1938, 1939, 1941, 1943/44), but I didn't find them listed. I checked spellings of Herring, Hering, Harring, Haring.
WW I Draft Registration Cards, 1917-1918
Name:Albert Lee Herring
Home Address: N 4908 Lincoln, Spokane, Spokane County, Washington
Date of Birth: March 6, 1878
Native Born: Yes
Occupation: Clerk Grocery
Employer's Name: Coleman Grocery
Place of employment: 104 W 2nd, Spokane, Spokane County, Washington
Nearest Relative Name: Jessie Herring, Wife
Nearest Relative Address: 4908 Lincoln, Spokane, Spokane County, Washington
Signature: Albert Lee Herring.
Build: Medium, 185 lbs
Color of Eyes: Brown
Color of Hair: Black
Date of Registration: 9/12/1918
Source Citation: Registration State: Washington; Registration County: Spokane; Roll: 1992106; Draft Board: 4. Digitized Image on Ancestry.com.
1920 Federal Census:Living at 4908 N Lincoln, in Spokane, Spokane County, Washington, Dalke Precinct.
Date: 9th & 10th of January 1920. Sheet 9A, stamped #55, E.D. 211.
Household members listed as: A. L. Herring (Head, age 41, born in Illinois, Salesman, Produce), Jessie (Wife, age 40, born in Illinois) Robert Lee (Son, age 3 11/12, born in Washington).
Source Citation: Year: 1920; Census Place: Spokane, Spokane, Washington; Roll: T625_1941; Page: 9A; Enumeration District: 211; Image: 745. Digitized Image on Ancestry.com.
This should give you enough proof that Mrs. A. L. Herring was Jessie.