æt-fón
This might be just a supplemental entry substituting part of an entry in the Main Volume.
In the OE text, the length is:indicated by acute accentsindicated by macronsnot indicated.
æt-fón
Substitute: To arrest, apprehend, attach stolen or lost property Gif man óðrum mæn feoh forstele, and se ágend hit eft ætfó. Ll. Th. i. 30, 8. Gif feoh man eft æt þám mæn in Cent ætfó, 34, 6. Cf. 160, 8.
This is a supplementary entry with editorial changes to an entry in the main volume of the dictionary. Look under the 'Possibly connected entries' below, or for the same headword in the list to the left.

A Combined List of Abbreviations.

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A Combined List of Abbreviations.