William Hulen married Martha Dunbar, 1 Feb 1841, William being Harvey's father. William died 14 Apr 1853. Martha then appears to have married Simeon Rouse and is found in the household in 1860. Then Martha marries a John Wall on 9 Mar 1879 in Boone County

Simon Rouse household 1860 census
Name: Simeon P Rouse
Age: 32
Birth Year: abt 1828
Gender: Male
Birth Place: Kentucky
Home in 1860: Rocky Fork, Boone, Missouri
Post Office: Columbia
Dwelling Number: 184
Family Number: 183
Occupation: Farmer
Household Members:
Name Age
John W Ward 25
Nancy Ward 25
Sally J Ward 2
Simeon P Rouse 32
Martha Rouse 35
Harvey Rouse 14
Marcus W Rouse 12
Wm L Rouse 10
Robert B Rouse 8
Wm M Rouse 8
Susan A Rouse 3
Acillus Rouse 1

1870 census has a very mixed and ill indexed entry that really needs to be seen as original image

Dwelling Number 1
Home in 1870
Township 50, Boone, Missouri
Post Office Sturgeon
Martha Rouse age 45
Robert Hulen age 18
Alice Rouse age 12
Ellen age 9
Simeon age 3

The connection between Simeon P Rouse and George W Rouse is they are cousins. George W Rouse's father was Allen Rouse b Bullitt Co. KY 1800 d: 25 Aug 1877. Simeon P Rouse born 1823 father was Simeon Sr b abt 1798 d Boone County with probate 1857. Allen and Simeon Sr. were brothers whose father was Moses Rouse.

Hope this helps do not confuse Alfred Rouse with Allen Rouse both are in Boone County but are not the same person! And it is Simeon P Rouse not Simon Rouse.

John R