The CD contains images of armigers whose arms are depicted in The Victoria County History of Lancashire, and the blazons thereof. Also some corporate heraldry (civic, ecclesiastical etc) and a list of seals.
Heraldry enthusiasts will notice the different spellings for the same charges. These are, no doubt, as shown in the original sources. There are some errors, however! What self-respecting armorist would write the words “Gold” and “Silver” in a blazon? – or show a mullet of five points upside down without mentioning it in a blazon? The dedicated armorist will no doubt check with other sources of heraldic information.