Yes, I have also found that Jane married Solomon Pulver.
Jane Lockwood and Hiram Serviss were married 22 Mar 1838 at Florida, Montgomery, New York.
(FindmyPast.com, NYGBS, New York State religious records 1716-1914 The Reformed Protestant Dutch Church of Florida, in the Village of Minaville, Town of Florida, Montgomery County, NY and the Reformed Protestant Dutch Church of Duanesburgh, 1798-1804 Publication year:1919 Image number: 109 also Ancestry.com, U.S., Newspaper Extractions from the Northeast, 1704-1930 (Provo, UT, USA, Ancestry.com Operations, Inc., 2014), Record for Mr Hiram Servoss. http://search.ancestry.com/cgi-bin/sse.dll?db=50015&h=53...
Hiram and his wife Jane conveyed land to Jacob T Serviss in 1839. It appears this land was purchased from Peter Sterling in 1838.
It appears they moved from NY to Michigan than Iowa. They are listed in the 1850 US census in Bonaparte, Iowa. The oldest children, James and Lorenzo (11 and 7) are reported to have been born in NY the youngest, George, 4, was born in Michigan. In 1860, Jane is widowed and the 3 sons live with her (George is listed as Lee- perhaps a middle name?). Their birth places remain as NY, NY and Mich.
(1850 United States Federal Census Record for Hiram Service.
1860 United States Federal Census Record for Jane G Serviss.)
As you have found, Jane remarried to Samuel Foster (this is also found in the Fold3 pension file). She is Jane Serviss in the 1860 census, dated 28 Aug 1860. The pension file gives the date of her husband's deaths as: Hiram died in 1855, Samuel Foster died May 1861. She was dropped from the pension rolls due to remarriage (to Solomon Pulver) 29 Dec 1868. He died in 1882- in his will he names Jacob T Serviss as executor.
Jane reapplied for pension and was dropped due to death in 1896.
Lorenzo Serviss, middle son of Jane and Hiram, had enlisted 2 Aug 1862 and died in service in Dec 1862 or 1863. There are conflicting dates in the file but seems to be about 7th or 8th. The Find A Grave Memorial# 73007834 for Lorenzo gives 8 Dec 1863. On the same marker are 2 people. George, died 1864 and someone who's name is cut off in the photo. I wonder if that may be James but have not found any proof.
Sorry, I don't have anything really about their time in Michigan, just the census records that show the birth of George there. Most of what I have is Iowa.
My interest in this family stems from trying to find the parents of my James T Serviss. He was born about 1812 in Montgomery county NY and lived his life in NY dying in 1879. His first child was named Hiram so I wondered if he might be connected to any other Hirams in the area. That is how I found Hiram (marr. Jane). He is certainly too young to be James father, but is feasible to be a brother. Jacob, Hiram's brother, also has the middle initial T. I wonder if you know anything more about Hiram's family you can share?