Sec. 4. And it be further enacted, That any person who shall knowingly and willingly obstruct or hinder such claimant, his agent or attorney in so seizing or arresting such fugitive from labour, or shall rescue such fugitive from such claimant, his agent or attorney when so arrested pursuant to the authority herein given or declared; or shall harbor or conceal such person after notice that he or she was a fugitive from labour, as aforesaid, shall for either of the said offences, forfeit and pay the sum of five hundred dollars. Which penalty may be recovered by and for the benefit of such claimant, by the action of debt, in any court proper to try the same; saving moreover to the person claiming such labour or service, his right of action for or on account of the said injuries or either of them.