An examination of two unique invitatory antiphons (Laudabilem virum. Adaperiat Dominus cor) in the autumn per annum office reveals a special set of mode 2 invitatories. which also adapt proper (scriptural) texts. These appear as geographically scattered instances in various medieval rites. https://www.hindigyanvishv.com/special-deal-Fluffy-White-Feather-Tinsel-Angel-Halo-quick-deal/