3. In collecting old glass he who “hesitates” has lost it to his neighbor.
4. Don’t believe all you hear—investigate.
5. Don’t collect EARLY “WOOLWORTH.”
6. Don’t let envy keep you from enjoying and studying another’s collection.
7. Don’t tell everybody what you are looking for, a rival collector is born every minute.
8. Don’t seek numbers of specimens, seek fine workmanship.
9. Don’t call everything that you cannot classify Canadian, English, or Spanish. Comparison of specimens and time will change your opinion.
10. Don’t quote prices for by so doing the market is ruined for both dealer and collector. The value is according to what you pay and to-morrow you may obtain the same piece for more or less.
11. Don’t keep your glass in a dark cup-board done up in paper. Let others enjoy the fruits of your labor.
12. Considering that everyone’s taste is not alike “an unfair exchange is no robbery.”