Ok,I will try to be in touch with them.If I don't get a human being I will leave info,and also a way for them to contact you.
It won't hurt tho,to be in contact with county animal control.Not sure how things are in that county,but I know here for chesterfield county,if a stray is spotted,we only have one office for animal control,so they cover a large area for pick ups.
I think any and all animal control offices & shelters must be called,even if it is not in the town.
One never knows how far,Angus may have traveled before,he may have been picked up,if that is the case.
I still beleive in my heart,he is coming home,or trying desperately to come home.
I know it is hard,with the lack of response from the family...but I still think,even if you have to get a magistrate or officer to go with you,some contact must be made with this family.Or have them contact them.They have to come to thier senses,and at least be in touch.
I know it has rained miserably,but would even leaving something from your home somewheres,maybe along the property perimeter be helpful.I know you said thier land is quite large,and they are not close to a road,it is a possibilty he is hunkered down somewheres.