Holinshed's Chronicles, Volume V: Scotland, page 235
faithfullie serued him in pursute and apprehension of the rebels, and giuing them heartie thanks, he bestowed sundrie honorable gifts amongst them, of the which number Donwald was one, as he that had béene euer accounted a most faithfull seruant to the king.
At length, hauing talked with them a long time, he got him into his pruie chamber, onelie with two of his chamberlains, who hauing brought him to bed came foorth againe, and then fell to banketting with Donwald and his wife, who had prepared diuerse delicate dishes, and sundrie sorts of drinks for their reare supper or collation,* wherat they sate vp so long, till they had charged their stomachs with such full gorges, that their heads were no sooner got to the pillow, but asléepe they were so fast, that a man might haue remooued the chamber ouer them, sooner than to haue awaked them out of their droonken sleepe.
Then Donwald, though he abhorred the act greatlie in heart, yet through instigation of his wife hee called foure of his seruants vnto him (whome he had made priuie to his wicked intent before, and framed to his purpose with large gifts) and now declaring vnto them, after what sort they should worke the feat, they gladlie obeied his instructions, & spéedilie going about the murther, they enter the chamber (in which the king laie) a little before cocks crow, where they secretlie cut his throte as he lay sléeping, without anie buskling* at all: and immediately by a posterne gate they caried foorth the dead bodie into the fields, and throwing it vpon an horsse there prouided readie for that purpose, they conuey it vnto a place, about two miles distant from the castell, where they staied, and gat certeine labourers to helpe them to turne the course of a little riuer running through the fields there, and digging a déepe hole in the channell, they burie the bodie in the same, ramming it vp with stones and grauell so closelie, that setting the water in the right course againe, no man could perceiue that anie thing had béene newlie digged there. This they did by order appointed them by Donwald as is reported, for that the bodie should not be found, & by bléeding (when Donwald should be present) declare him to be guilie of the murther. For such an opinion men haue, that the dead corps of anie man being slaine, will bléed abundantlie if the murtherer be present. But for what consideration soeuer they buried him there, they had no sooner finished the worke, but that they slue them whose helpe they vsed herein, and streightwaies therevpon fled into Orknie.
Donwald, about the time that the murther was in dooing, got him amongst them that kept the watch, and so continued in companie with them all the residue of the night. But in the morning when the noise was raised in the kings chamber how the king was slaine, his bodie conueied awaie, and the bed all beraied* with bloud; he with the watch ran thither, as though he had knowne nothing of he matter, and breaking into the chamber, and finding cakes of bloud in the bed, and on the floore about the sides of it, he foothwith slue the chamberleins, as guiltie of that heinous murther, and then like a mad man running to and fro, he ransacked euerie corner within the castell, as though it had béene to haue seene if he might haue found either the bodie, or anie of the murtherers hid in anie priuie place: but at length comming to the posterne gate, and finding it open he burdened the chamberleins whome he had slaine, with all the fault, they hauing the keies of the gates committed to their kéeping all the night, and therefore it could not be otherwise (said he) but they were of counsell in the committing of that most detestable murther.
Finallie, such was his ouer earnest diligence in the seuere inquisition and triall of the offendors héerein, that some of the lords began to mislike the matter, and to smell foorth shrewd tokens, that he should not be altogither cleare himselfe. But for so much as they were in that countrie, where he had the whole rule, what by reason of his friends and authoritie togither, they doubted to vtter what they thought, till time and place should better serue therevnto, and héervpon got them awaie euerie man to his home. For the space of six moneths togither, after this heinous murhter thus committed, there appéered no sunne by day, nor moone by night in anie part of the realme, but still was the skie couered with continuall clouds, and sometimes such outragious winds arose, with lightenings and tempests, that the people were in great feare of present destruction.