Thanks, Gene. According to the website you supplied, there's a different theme song for Hopalong Cassidy:

Here he comes, here he comes
There's the trumpets, there's the drums, here he comes.
Hopalong Cassidy, here he comes.

(humming)

There he goes, on his way,
Down the trail the cowboy way.
Hopalong Cassidy, Hopalong Cassidy.

He returns, soon again,
There's no use to say goodbye until then.
Hopalong Cassidy, so long Hopalong.

   Can someone clear up the confusion?