Richard Parkinson Sedgwick  [John Sidgwick / Alice Wilkinson]
b. October 26, 1886, England
d. June 9, 1961
m1 abt 1907,² Jessie Miriam Williamson
m2 abt 1910,² Cynthia May Willey
m3 Lena B (Cox) Butler

Jessie Miriam Williamson  [D H Williamson, Jessie Unknown]
b. abt 1886, Iowa²
m1 Unknown Black¹ m2 abt 1907², Richard Parkinson Sedgwick

Cynthia May Willey  [parents unknown, both born Iowa]²
b. abt 1888, Iowa²

Census records:

At the 1910 census, Richard was widowed and living with his parents, and reported as widowed, but his estranged wife Miriam and a son were living not far away with her parents.

A family tree exists at Ancestry.com which shows one Cynthia Maye Willey b. February 16, 1887 who married Unknown Sedgwick to be the daughter of Levi Willey (1855 - 1916)and Mary Lucenda Washburn (1861 - 1925), both born Iowa. However, I cannot find any census records or other evidence, so I won't add it for now.

There is no indication that Cynthia May Willey was married before Richard, so based on the 1911-1912 birth of daughter Dorothy M, I assume that Richard and Cynthia were married later in 1910 or early 1911. Can't find them anywhere in the 1930 census.

Children of Richard Parkinson Sedgwick and Jessie Miriam Williamson:

Children of Richard Parkinson Sedgwick and Cynthia May Willey:

1. Records of descendant/researcher of this family:
a. Clara Wilson, granddaughter of John's son Anthony
    her source of much of the data is the Vivian A Travis book listed below.

2. Census records, any of those indicated.

3. Descendants of Anthony and Alice (Sayer) Wilkinson
by Vivian A Travis, 1978, pages 47 - 58, copy sent by Clara Wilson.