The Walker household in which Winslow grew up included two wives of his father, William Holmes Walker: the first (and legal) wife was Olive Hovey Farr, and the second was Mary Jane Shaddon. They can all be found together in the census return of 1880. Indeed, the Walker establishment in 1870 included two more wives as well, though Mary Jane was for some reason not listed at that time.

Thank you to John Chandler for sending this information.

Information taken from Book: History and descendants of Jacob Scott - John Scott, Volume 2. Winslow and Sarah had nime children: Sarah Zola born Dec 22, 1883 and died Nov 5, 1885; Mary Comfort 1885 - 1974; Winslow Scott 1887 - 1925; Emmett Carlos; LeGrande "Lee" born April 14, 1892 - died Sept 30, 1954; Verla Jennie 1894 - 1971; Ray Willis 1896 - 1979; Docia Luzella born Oct 4, 1898 - Aug 3, 1909; Baby girl born May 24, 1899 - May 24, 1899.

The information below was submitted by Amanda Fox. Thank you for your assistance.
(Published in History of Idaho: The Gem of the Mountains Vol. 3 by James H. Hawley 1920)

Winslow T. Walker, a prominent and prosperous farmer, for years a resident of Rexburg, Idaho, was born in Salt Lake City, Utah, October 10, 1862, a son of William and Mary (Shadden) Walker. He was reared and educated in Cottonwood, Utah, and remained with his parents until he became of age, helping to farm on the home place for one year. He then removed to southern Utah and there bought a tract of land, which he operated for about twelve months, at the end of this time returning to Salt Lake, where he remained for one year. In 1884, Mr. Walker came to Idaho and located at Labelle, Jefferson county, going thence to Oneida county. He filed on a tract of land, which he improved and continued to operate for about fifteen years, when he sold his interests there and bought land at Lewisville, which he cultivated for a period of five years, then selling out and removing to Rexburg. Here he acquired land a half mile north of the town, which tract he improved and operated until 1909, when he turned it over to his sons, and they are still carrying on farming operations there. When Mr. Walker came to Rexburg, he bought a fine home, and has occupied it ever since. In 1909 he went to work for the Keller Implement Company and remained with that company for seven years but for some time past he has been with the Consolidated Wagon and Machine Company.

In December, 1881, Mr. Walker was married to Sarah M. Scott, and they became the parents of nine children, namely: Mary C, now married; Winslow S.; Emmet C; LeGrand, who served in France for one year; Verla J., married; R. Willis; Sarah J., deceased; Docia L., deceased; and one who died in infancy.

Mr. Walker gives his active support to the republican party, and has always warmly espoused its policies and principles but has never been a seeker after public office. He is an earnest member of the Church of Jesus Christ of Latter-day Saints, and deeply interested in all its good works. He served as bishop at Labelle, Idaho, for fourteen years. Mr. Walker gives a good citizen's attention to all movements designed to advance community welfare along legitimate lines and is generally regarded as one of the progressive men of Rexburg.