To Prevent Bedbugs From Remaining Either in the House or Bedstead
Take two tablespoons of lard and one ounce of quicksilver; beat the white of an egg then stir them all together. With a small brush or stick put this mixture in every crack or crevice where vermin can hide; do this after cleaning house and you will never be troubled with vermin. If you have them already, use corrosive sublimate first. Take off your rings while applying this preparation as it injures gold.
Source: 76: A Cook Book
To keep away Bed-Bugs
Scald and saturate the holes and bedstead thoroughly with hot strong soap-suds, or water diluted with corrosive sublimate ; dip the cord also in the same liquor. Then, before putting up the bedstead, dip the feathered end of a quill into soft soap, or hard soap melted, or any kind of paint, and work it round in the cord-holes of the beams and elsev/here. This renders every part obnoxious to them, and they will not inhabit it.
Source: Valuable Receipts, J.M. Prescott