The likely places for a Ferrisburgh obit at that time period would be the Addison Independent out of Middlebury or the Burlington Free Press out of Burlington. I'm not sure whether either have obits on line. Burlington's are can be searched at a few locations on film. The state library in Montpelier also has many VT papers on film. It is possible that the Sheldon Museum in Middlebury keeps hard copies of the Independent.