Al Wilson wrote or rather re wrote 'On the road again'. The record company is alleged to have taken the copyright and the song writing rights from him, and also his royalties. I'm not sure but his family were alleged to have been involved somewhere, If you read Fito de la Parra's biography 'Living the blues' it gives the details. I understand it was a series of sales, company wind ups and re-sales. The chapter entitled 'We are not a royalties company' is quite revealing.