heorþ
This might be just a supplemental entry adding to an entry in the Main Volume.
Related §§ in Wright's OE Grammar:
In the OE text, the length is:indicated by acute accentsindicated by macronsnot indicated.
heorþ
Add:I. a hearth, fire place Fyrpannae vel herth arula, Txts. 36, 5. Hearth, 123, 17. Heort foculare, Wrt. Voc. ii. 39, 38. Íren hiorð arula, 10, 21. Heorðe fornacula, log, 7: 35, 77. Wermód gesodenne on wætere on níwum cytele, dó of heorðe, Lch. ii. 44, 2. Brǽdingce on heorþum tó móse assaturam (alimentorum) in focularibus (praeparatam) ad edulium, An. Ox. 376 : Wrt. Voc. ii. 82, 30. II. as typical of the household or home Án mylen . . . and .vii. heorðas bútan ðon, and þreó cyrcan, C. D. v 316, 2. v. wígbed-heorþ.
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A Combined List of Abbreviations.

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A Combined List of Abbreviations.