It appears Caroline drew Philander's pension for service in the 1st NH Light Battery during the Civil War.
Hopkins, Philander, First NH Light Artillery b. Montpelier, Vt.; age 40; res. Manchester; enl. Oct. 25, '61; must. in Oct. 25, '61, as Artificer; re-enl. Dec. 23, '63; must. in Dec. 26, '63; must. out June 9, '65.
The age reported on the miltary record seems to be considerably wrong.
1870 census of Chichester:
Philander Hopkins 60 VT
Caroline E Hopkins 42 NH
Joseph Mason 51 NH
Caroline E Rand Hopkins
1828–1907 (m. 1869)