Rory Block’s on-going tribute to classic female blues artists continues with an emphasis on some lesser heralded while still finding space for nods to Ma Rainey and Memphis Minnie.  Ms. Block’s assimilation of these early styles plays out in delivery that places this vocalist/guitarist/blues crusader among an extremely select few present-day performers such as John Hammond.  That said, Ms. Block’s own “Eagles” may be the show stealer of this set.  Her one-woman band approach is highlighted by captivating multi-tracked vocal choruses.