Squirrels were popular pets in past centuries. They were kept in special cages that included a running wheel or other type of exercise machine.

Many of the cages were shaped like a house or other type of building. All had an entrance door, removable tray at the bottom to aid in cleaning the cage and a feeding dish. Some even had material formed into a nest in one corner. They were made of tin and wood.

Some paintings of children from the 18th and 19th centuries picture pets that include a squirrel peering through the bars of the cage.

Prices for antique and vintage cages range from $200 to $1,500. They are displayed as folk art and historic relics.

Ivory jewelry

Q: I have some ivory jewelry that I got in the 1970s. My daughter told me I can't sell it because of the laws prohibiting the sale of elephant ivory. What should I do?

A: International ivory trade was banned in 1989 by the Convention on International Trade in Endangered Species, an agreement by several member nations. According to the U.S. Fish & Wildlife Service, it is not illegal to own or sell ivory imported before Jan. 18, 1990. The date can be established by a bill of sale or other document or even a datable photo picturing the owner with the item. More stringent rules apply in some states. You may have to prove the ivory was harvested before 1973.

Terry and Kim Kovel will answer as many letters from readers as possible through the column only. For return of a photograph, include a self-addressed, stamped (55 cents) envelope. Write to: The Kovels, c/o King Features Syndicate, 300 W. 57th St., New York, NY 10019. The website is kovels.com.

current prices

Prices from shows nationwide:

Wood carving, heart in hand, square base, balsa wood, patina, 1900s, 12 inches, $65.

Advertising poster, Greenfield's Chocolates, woman with hat boxes, paper, 1911, 23 by 13 inches, $120.

Omega wristwatch, Constellation, stainless steel case, yellow tone accents, woman's, 6 inches, $300.

Custard glass, lampshade, cone shape, embossed flowers, rosette, 1930s, 15 1/4 inches, $675.