The Rockford Morning Star wrote about the wedding:
Miss Annie Picken and Peter Langwell were united in marriage last evening.
The ceremony which united the lives of these young people was performed at 6:30 o'clock a the home of the bride's parents, Mr. and Mrs. James Picken, and was witnessed by a company of a hundred friends and relatives. The. Rev. W.T. Wilcox of Westminster church officiated and spoke the words that united the couple in impressive style.
Mr. Langell formerly lived in this vicinity but recently has been engaged in the management of a creamery at Lodus, N.Y. He is a capable young man and has many friends here who congratulated him on his marriage. The bride is a popular young lady who has lived in this city for five years. She was employed in the office of Fisher and North. She has many friends an carried their sincerest wishes for happiness in her new home.
They moved to New York where Peter worked at a creamery. Later they lived in Vermont and Massachusetts, where she passed away in 1938. 
Esther Margaret 1901-1999
Katheryn E 1905-1922
James P 1910-2000
↑ "United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MX2S-TQB : 14 August 2017), Annie Picken in household of James Picken, Harlem, Winnebago, Illinois, United States; citing enumeration district ED 220, sheet 56A, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d.), roll 0261; FHL microfilm 1,254,261.
↑ "Illinois, County Marriages, 1810-1940," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:QK9L-VPKV : 14 October 2017), Peter Langwill and Annie J Picken, 29 Jun 1897; citing Winnebago, Illinois, United States, county offices, Illinois; FHL microfilm 1,914,047..
↑Ancestry.com. Massachusetts, Death Index, 1901-1980 Original data: Department of Public Health, Registry of Vital Records and Statistics. Massachusetts Vital Records Index to Deaths [1916–1970]. Volumes 66–145. Facsimile edition. Boston, MA: New England Historic Genealogical Society, Boston, Massachusetts.
Name: Ann Janet Langwill
Death Date: 1938
Death Place: Springfield, Massachusetts, USA
Volume Number: 79
Page Number: 459
Index Volume Number: 97
Reference Number: F63.M363 v.97
"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M5H3-5ML : accessed 15 May 2018), Annie J Langwill in household of Peter Langwill, Rochester Ward 21, Monroe, New York, United States; citing enumeration district (ED) ED 209, sheet 9B, family 202, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 993; FHL microfilm 1,375,006.
"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MZT1-B2Y : accessed 15 May 2018), Annie J Longwill in household of Peter Longwill, Rockingham, Windham, Vermont, United States; citing ED 123, sheet 20A, line 50, family 513, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, 1992), roll 1876; FHL microfilm 1,821,876.
United States Census, 1930,' database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XQGJ-TQ5 : accessed 15 May 2018), Annie J Langwill in household of Peter Langwill, Springfield, Hampden, Massachusetts, United States; citing enumeration district (ED) ED 85, sheet 34B, line 68, family 538, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 911; FHL microfilm 2,340,646.
It may be possible to confirm family relationships with Annie by comparing test results with other carriers of her ancestors' mitochondrial DNA.
However, there are no known mtDNA test-takers in her direct maternal line.
It is likely that these autosomal DNA test-takers will share DNA with Annie: