Henry Stackpole is shown as being born in Maine c. 1828. His eldest child was born c. 1853 in VT, indicating that he moved from maine to Vermont at least one year prior to that, since he would have had to have met and married wife Aphia, by 1852. So, most likely he was there by 1851 if not earlier.
Waterbury, Washington, VT 1860 US Census
|Name||Age in 1860||Birth Year||BirthPlace|
|Henry Stackpole||32||abt 1828||Maine|
|Apphia Stackpole||29||abt 1831||Vermont|
|Charles H Stackpole||7||abt 1853||Vermont||Mary J Stackpole||2||abt 1858||Vermont|