Individual Details

Her age is difficult to read in the 1850 census but I do think it was 13, not 18 - the 1860 census agrees with the younger age.

Martha married Horatio Bostwick.

1860 Census. Glasgow, Howard Co MO, Hh 521
H. M. Bostwick, age 25, merchant, b. New Jersey
Martha E., 22, b. MO
Virginia A. 18, b. Ohio
Julia B. 14, b. New Jersey
Harry C. 15, Clerk, b. New Jersey
Thos. H. Messick, 26, Clerk, b. Maryland
Vennous Stachle, 22, Barber, b. Wertenberg
Note: it would seem that Bostwick had several siblings living with them.

Birth

1837

Missouri

Father	James A. Shirley (1800 - )
Mother	Martha Jane Haden (1816 - 1867)
Sibling	Joel H. Shirley (1835 - 1867)
Sibling	Mary E. Shirley (1840 - 1867)
Sibling	Ibera S. Shirley (1842 - )
Sibling	James A. Shirley Jr. (1846 - )
Sibling	Charles H. Shirley (1848 - 1867)