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Outlined is the discovery of a very faint, diffuse, low surface-brightness(0.5 \mJybeam, 1.4 \mJyarcminsq on average) structure around the radio sourceB2 0258+35 hosted by an HI-rich early-type galaxy (NGC 1167). Since B2 0258+35is a young Compact Steep Spectrum (CSS) source, the newly discovered structurecould represent a remnant from an earlier stage of AGN activity.  We go on by explaining in detail all the possibilities for triggering theradio activity in B2 0258+35 regarding gas accretion in a recurrent AGNactivity framework.  NGC 1167 hosts a very regular, extended and massive \HI\ disc that has beenstudied in great detail. Previous studies of the \HI\ closer to the core seemto go against the assumption of a circum-nuclear disc of \HI\ as the source ofthe accreting gas.  We consider the cooling of gas from the hot, X-ray halo as a possiblealternative option for the fueling of the AGN, as suggested in the case ofother sources of similar radio power as B2 0258+35.  Estimates are given for the age of the faint diffuse emission as well as forthe current accretion rate, which are in good agreement with literature values.  If our assumptions about the accretion mechanism are correct, similarlarge-scale, relic-like structures should be more commonly found aroundearly-type galaxies and this will be hopefully confirmed by the next generationof sensitive, low-frequency radio surveys.

Recurrent radio emission and gas supply: the case of the radio galaxy B2 0258+35