I found these songs on Pirate Bay under the name Definitive Demos (1963-1966).
Where have these songs been before and are there some that are not previously known of.Here are the songs:
1. The Rolling Stones - Diddley Daddy (2:40)
2. The Rolling Stones - Road Runner (3:05)
3. The Rolling Stones - Bright Lights Big City (2:26)
4. The Rolling Stones - Baby What's Wrong (3:28)
5. The Rolling Stones - I Want To Be Loved (2:03)
6. The Rolling Stones - Snap Crackle Pop (0:28)
7. The Rolling Stones - I'd Much Rather Be With The Boys (2:12)
8. The Rolling Stones - And Mr. Spector & Mr. Pitney Came Too (3:09)
9. The Rolling Stones - Andrew's Blues (3:00)
10. The Rolling Stones - Hi-Heel Sneakers (2:59)
11. The Rolling Stones - Stewed And Keefed (4:08)
12. The Rolling Stones - Tell Me Baby (How Many More Times?) (1:55)
13. The Rolling Stones - Down In The Bottom (2:42)
14. The Rolling Stones - Don't Lie To Me (1:57)
15. The Rolling Stones - Con Le Mie Lacrime (2:15)
16. The Rolling Stones - Some Things Just Stick In Your Mind (2:24)
17. The Rolling Stones - Each And Everyday Of The Year (2:45)
18. The Rolling Stones - Heart Of Stone (3:43)
19. The Rolling Stones - (Walking Through The) Sleepy City (2:50)
20. The Rolling Stones - We're Wastin' Time (2:39)
21. The Rolling Stones - Try A Little Harder (2:18)
22. The Rolling Stones - Everybody Needs Somebody To Love (2:54)
23. The Rolling Stones - When Blue Turns To Grey (2:31)
24. The Rolling Stones - I've Been Loving You Too Long (2:52)
25. The Rolling Stones - Looking Tired (2:13)
26. The Rolling Stones - Out Of Time (3:22)
27. The Rolling Stones - Can't Believe (3:17)
28. The Rolling Stones - If You Let Me (3:13)

>Where have these songs been before and are there some that are not previously known of

I think all of them seem to be material thats already been either released or frequently bootlegged.

All well known stuff, released on at least 3 up till dozens of boot CDs.

Unreleased is I Wanna Be Your Man I (reportedly a completely diff. version) for instance which was recently discovered on a acetate 7". But I think nobody on this board heard it.