Oh, the s^Gummer t^Cime is c^Goming and the l^Ceaves are sweetly t^Gurning And the w^Cild m^Gountain t^Emhyme looms ac^Amross the purple hea^Cther

Will ^Gyou go, ^CLassie, ^Ggo? If yo^Gu will no^Ct go wit^Gh me I will^C surely find a^Gnother

To pull w^Cild ^Gmountain th^Emyme all ac^Amross the purple hea^Cther Will ^Gyou go, ^CLassie, ^Ggo?

And we'll ^Call go toget^Gher to pull wi^Cld mou^Gntain thy^Emme All ac^Amross the purple he^Cather, will y^Gou go L^Cassie, ^Ggo?

And we'll ^Call go toget^Gher to pull wi^Cld mou^Gntain thy^Emme All ac^Amross the purple h^Ceather, will y^Gou go L^Cassie, ^Ggo?

I have seen another tab out there, that I don't think is quite right. Here is my take - much easier for accordion players, in my opinion.

Misc Traditional - Wild mountain thyme