Possible Clues:

• Of a whole group or kind
• Information going to one boy is applicable to the whole class
• Like cheap drugs
• Information man had applicable to whole class
• It's a matter for the whole class to have mixed the green, I see
• Information leading Heather shortly to cheap drug
• First book given to boy, appropriate for the whole class
• Referring to whole class, or boy with limited intelligence
• Information chap provided is not proprietary
• Not specific; of a class