Crispin, all agitated, his face ashen and drawn, could only shake his head.
‘Now,’ Athelstan persisted, ‘on the eve of St Damasus, the day of his murder, Sir Robert entertained Prior Alexander and Richer. He met you all in the solar?’
Alesia nodded, all watchful.
‘He put the Passio Christi back into its casket and returned here to his chancery chamber.’
‘Yes,’ Alesia replied. ‘Crispin, you went with him.’
‘How long were your father and Crispin absent?’
‘Not for very long, we were all preparing for supper.’
‘Precisely,’ Athelstan replied. ‘However, back in his chamber, Sir Robert was preparing to lock the bloodstone away. You, Crispin, intervened. You have read the “Liber”. You knew about the recuperative powers of the Passio Christi, especially round the Feast of St Damasus. How someone inflicted with a disease of the eyes should hold the precious bloodstone against their head? The “Liber” lists all such practices. You, Crispin, begged Sir Robert for such an opportunity to hold the precious relic against your own eyes. You pleaded as a loyal and faithful servant for help from the bloodstone. I am sure Richer coaxed you to ask and, perhaps, Sir Robert to consent. You may well have asked for this before. I am sure you did and your master agreed. On that particular evening you would point out that the bloodstone might soon pass from your master’s hands to others who might not be so obliging. Sir Robert approved. He gave it to you in trust for the night. You would, and he agreed, ask for the matter to be kept confidential. You took the Passio Christi and Sir Robert simply locked the coffer. Why should he object? In the morning the bloodstone would be returned by his faithful servant. Crispin certainly wouldn’t tell anybody. Neither would Sir Robert – why should he? You all adjourned for supper.’ Athelstan paused. ‘However, Crispin, you had planned a subtle death for your master. He would not survive the night to ask for the bloodstone back.’ Athelstan lifted the writing tray, gesturing at the quill pens. ‘I’ve studied your master. He was right-handed. He constantly nibbled at the quill plume. You prepared the pens left in this tray that night. You coated their plumes with the poison at your disposal; they were richly drenched in some noxious potion. Sir Robert would, as he was accustomed, nibble and chew at the quill plumes. He would absorb the poisons, small tinctures at a time but the mixture would, over hours, wreak their effect.’ Athelstan picked up a quill pen lying on the writing palette. ‘This is the proof. You thought you were safe, Master Crispin. You did not care. You had removed the poisonous quill pens you’d first laid here but, in fact, you were sealing in your own guilt. You made one miscalculation: the arrival of Sir John and myself. This chamber was secured. You could not rectify any omission.’ Athelstan held up the three quill pens for all to see. ‘Are these nibbled and chewed? No. More importantly, Crispin, you are left-handed. I am right-handed, I hold the quill such and the point on the right side of the pen becomes worn, yes? These, however, have been used by a left-handed writer.’ Athelstan turned all three quill pens, tapping their worn edges.
‘Sir Robert,’ he added. ‘Even when he was in the novitiate he was known for chewing the end of his pens. He laughingly referred to this, Crispin, when you and he were once strolling up the south aisle of St Fulcher’s abbey church. You were overheard by the anchorite who shelters there. Mistress Alesia, did you not tell me the same?’
‘It’s true,’ Alesia whispered, ‘my father always chewed the ends of his pens, a mannerism he couldn’t give up despite my scolding.’
Others murmured their assent. Crispin undid the cord of his cambric shirt as if he couldn’t breathe properly.
‘But we all came in here that morning,’ Lady Helen demanded. ‘Nobody moved anything, I am sure.’
‘Are you?’ Athelstan replied. ‘Look, Crispin is Sir Robert’s clerk. He has an ink horn and quills strapped to his belt. It’s one of the first things I noticed about him.’
‘He always carries pens,’ Alesia declared, ‘he always has ever since I can remember.’
‘It was the same that morning,’ Athelstan agreed. ‘You all came in here. You were distraught and distracted. Crispin, the faithful clerk, moved to Sir Robert’s desk. Why shouldn’t he rearrange the pens? He makes the exchange in the twinkling of an eye. He leaves these quills, the ones he has used himself, and takes the poisoned ones which, I am sure, he immediately burnt.’ Athelstan paused, letting the silence deepen.