The axe is a common heraldic charge, just as the cross is a common Christian symbol. An Axe Cross is an attempt to portray a fighting weapon as a Christian symbol.
Where a hammer is a tool used in construction, an axe is used for destruction. And yet that destruction could be a preliminary stage in the construction of something. Just as you can't make an omelette without breaking eggs, you can't make an empire without breaking legs.
The axeman was no match for
Albert Ramsbottom's drippin'
The axe is prehistoric; it has been used since the Stone Age for chopping down mighty tress and for hacking up animal carcasses. A man with an axe is not to be argued with and it has long been a symbol of strength and authority. Mussolini adopted a symbol which included an axe, and the implement has been for a long time the only friend of an executioner.
But the axe is not always used for demolition work. It is still a piece of equipment for firemen wouldn't do without. The fireman's axe may have saved as many lives as the battle axe has ended. Artists also use the axe to shape stone, wood or ice, to produce remarkable sculptures.
But in heraldry, the axe represents fighting and can be disguised as a cross to give a certain legitimacy to a warrior's profession.
Pick your weapon
(Edward lost control of the north of England and suffered an unfortunate reputation of being somewhat an incompetent king; one of his few accomplishments being born the son of the better known of Edward and Eleanor and his less prestigious royal acknowledgement of a certain fish. See Sam's Sturgeon.)
His shield bears six pickaxes. 'Six' is not understood to have any particular religious or military significance, but matches the six martlets on a tomb on the opposite side of the nave, being the coat-of-arms of Margery, Hugo's wife.
It is not known whether Hugo actually used an axe to fight the Scots and it is not known how many people died in the campaigns. We do not know the names of the fathers and sons who were killed on both sides of the border. Indeed, we are not too sure what they were fighting for, other than they were ordered to fight by their lords who were attempting to gain power and control of lands.
With both sides struggling to satisfy their greed, there was nothing Christian about the fighting. Even so, the cross was, and still is today, an icon to imply righteousness where none exists.
See also the Hammer of Thor.
It is not known whether the Pickworth relates to the Pickworth hamlet of Rutland or the Pickworth hamlet 20 km further north in Lincolshire. It may just as easily be another now-forgotten Pickworth which has been ploughed up following a plague or some other calamity.
A martlet is the diminutive of martin and appears as a heraldic charge.
The name 'Worth' is from the Saxon for court, farm, possession, etc., and in particular, the value (or worth) of that property. 'Pick' is likely from the Old English (pre 7th century) personal name 'Pica', which was perhaps a nickname for a tall thin person, from a Germanic element meaning 'sharp' or 'pointed', like the pike fish and the pickaxe. The term 'pickaxe' was likely coined long after Hugo's death, possible in the 15th century.