This three-CD release from Folkways came to my attention recently on the PreWar Blues list. I think it will be of interest to many of us here. While I have not had chance to acquire this, the contents list speaks for itself. There is plenty of blues material in the mix.
http://www.folkways.si.edu/search/AlbumDetails.aspx?ID=3136#---snip---
From 1961 to 1965, New York City?s trailblazing Friends of Old Time Music presented 14 concerts that brought dozens of legendary traditional musicians before city audiences for the first time. This "folk arrival" changed the course of American folk music, expanding the vision of the Folk Song Revival and leaving an indelible mark on the musical landscape. For Friends of Old Time Music, Peter K. Siegel, who personally recorded most of the concerts, handpicked 55 tracks from the original master tapes. They include the first concert appearances by Doc Watson, Roscoe Holcomb, Clarence Ashley, and Joseph Spence, and the triumphant return visits to New York by Dock Boggs and Mississippi John Hurt, who had made classic recordings in the city during the 1920s. 3 CDs of live concert recordings, 55 tracks (53 never before released), accompanied by a richly illustrated 60-page book Recorded, produced, and annotated by Peter K. Siegel.
A Henry Street Folklore production Produced in association with City Lore, Inc.
No.-Track-Artist/Performer
101 I'm Troubled Doc and Arnold Watson
102 The Country Blues Dock Boggs
103 Going Down to the River Fred McDowell
104 East Virginia Blues Roscoe Holcomb
105 The Storms Are on the Ocean Maybelle Carter
106 The Dream of the Miner's Child The Stanley Brothers
107 Soldier's Joy Hobart Smith
108 Coffee Blues Mississippi John Hurt
109 Live and Let Live Bill Monroe and His Blue Grass Boys
110 Lonely Tombs The Watson Family
111 Rockin' Boogie Jesse Fuller
112 Brown's Dream Gaither Carlton and Doc Watson
113 Down South Blues Dock Boggs
114 Knoxville Blues Sam McGee
115 Have a Feast Here Tonight The Stanley Brothers
116 Riley John Davis and the Georgia Sea Island Singers
117 Buck and Wing Jesse Fuller
201 Hell Among the Yearlings Arthur Smith
202 Amelia Earhart's Last Flight The Greenbriar Boys
203 The Brakeman's Blues Bill Monroe and His Blue Grass Boys
204 Foggy Mountain Top Maybelle Carter
205 Hicks' Farewell Doc Watson
206 Jordan is a Hard Road to Travel The New Lost City Ramblers
207 Write Me a Few of Your Lines Fred McDowell
208 Bimini Gal Joseph Spence
209 Shady Grove Bill Monroe and His Blue Grass Boys
210 Grey Eagle Bill Monroe and His Blue Grass Boys
211 Walkin' the Dog Bill Monroe and His Blue Grass Boys
212 San Francisco Bay Blues Jesse Fuller
213 Short Life of Trouble Doc and Arnold Watson
214 John Henry Roscoe Holcomb
215 Kneelin' Down Inside the Gate Stanley Thompson
216 Tell Me Why You Like Roosevelt McKinley Peebles
217 Bury Me Under the Weeping Willow Maybelle Carter
218 Mansions for Me The Stanley Brothers
219 Before This Time Another Year Bessie Jones and the Georgia Sea Island Singers
301 My Creole Belle Mississippi John Hurt
302 Guitar Lesson Jesse Fuller
303 Cincinnati Blues Jesse Fuller
304 Poor Boy in Jail Dock Boggs
305 He's Solid Gone Maybelle Carter
306 Maggie Walker Blues The Clarence Ashley Group
307 Chevrolet Ed Young and Emma Ramsay
308 Rising Sun Blues Roscoe Holcomb
309 Lord, Build Me a Cabin in Glory Bill Monroe and His Blue Grass Boys
310 Frankie and Albert Mississippi John Hurt
311 Hard Times The Stanley Brothers
312 The Miller's Will Horton Barker
313 The Coo Coo Bird Clarence Ashley
314 Double File Gaither Carlton and Doc Watson
315 The Wandering Boy Annie Bird
316 Stranger Blues Jesse Fuller
317 I Saw the Light Bill Monroe and His Blue Grass Boys
318 Sugar Hill Maybelle Carter
319 Amazing Grace The Clarence Ashley Group