Whosoever shall unlawfully apply or administer to or cause to be taken by, or attempt to apply or administer to or attempt to cause to be administered to or taken by, any person, any chloroform, laudanum, or other stupefying or overpowering drug, matter, or thing, with intent in any of such cases thereby to enable himself or any other person to commit, or with intent in any of such cases thereby to assist any other person in committing, any indictable offence, shall be guilty of felony, and being convicted thereof shall be liable . . . F1 to be kept in penal servitude for life . . . F1