This section is from the book "Spons' Mechanics' Own Book: A Manual For Handicraftsmen And Amateurs", by Edward Spon. Also available from Amazon: Spons' Mechanics' Own Book.
Fig. 447 shows a handy little tack-wrench for drawing small nails out of wood. A more complicated implement is the "Victor" nail-puller, which is said to remove nails without injuring either them or the wood, and which costs 10s.