Yes, it may well have been, though a Deerhound cross would have been more usual than a Wolfhound and a Greyhound or Whippet cross more usual than either - I've also see Lurchers who were Saluki crosses. A lurcher isn't a breed (even a non-pedigree breed like the Working Sheepdog) or even a standard cross like a Labradoodle - it is the name given to a type of dog that is an intermixture of sighthound and herding dog. A cross between two sighthounds (say a Greyhound and an Irish Wolfhound) is not a lurcher but a "longdog".