Hull, Burling: Fifty Sealed Message Reading Methods ©1944 Published by Stage Magic, Woodside, LI, NY Hardcover, 56 pages Published in the U.K. by L. Davenport & Co., London

Image courtesy e-Bay seller BayWindowBooks

Cover of older 1920's 12 Methods Image courtesy eBay seller MagicCollectiblesPlus

Comments: I'm assuming the 12 Sealed Message Reading Methods printed in 1920 are included in the 50 Methods book, but I don't have either book to validate this.
I just wanted to post the cover image so you'd be aware of the older manuscript.

Contents (numbers are not page numbers)

1 Section One for Stage Use Using Assistants
1 Stage Mind Reading: The Introductory Lecture
2 Method One - Hold Out
3 Method Two - Box
4 Method Three - Basket
5 Method Four - Switch
6 Method Five - Collection
7 Method Six - Brass Ball
8 Method Seven - Mirror Ball
9 Method Eight - Bag Idea
10 Method Nine - Communicate
11 Method Ten - Wireless
12 Method Eleven - Direct
13 Method Twelve - Metal Ball
14 Method Thirteen - Stand
15 Method Fourteen - Rollers
16 Method Fifteen - Projector
17 Method Sixteen - Blackboard
18 Method Seventeen - Sleeve
19 Method Eighteen - Water
20 Method Nineteen - Faro Box
21 Method Twenty - Lead-off
22 Method Twenty-a - Chicago Ball
23 Method Twenty-one - Eureka Idea
24 Method Twenty-two - Hull's
25 Method Twenty-three - De Luxe Question Transmitter
26 Method Twenty-four - Super Stage Method Mind Reading Act

27 Complete Acts and Systems for Club, Banquet And Parlor
28 No. 25 Hull Sealed Readings
29 No. 26 Mind Devination
30 No. 27 Puhl's Reading Supreme
31 No. 28 Unique Question Act
32 No. 29 Envelope Stylus Act
33 No. 30 Hull Tray Reading Act
34 No. 31 Envelope Package Reading
35 No. 32 Book Reading Method
36 No. 33 Gysels Envelope Pile

37 Miscellaneous Methods for Close Work and Club Acts
38 No. 34 Hull Sheet Readings
39 No. 35 Reado Method System
40 No. 36 $25 Sealed Test
41 No. 37 Mens Revelo Test
42 No. 38 Burling Hull Test
43 No. 39 The Fay Readings
44 No. 40 Hull's Club Stationary

45 Clairvoyant Type Readings for Close Work
46 No. 41 Sealed and Burned
47 No. 42 Hull Box and Ashes
48 No. 43 Hull Folded Billet
49 No. 44 Envelope Reading
50 No. 45 Dark séance
51 No. 46 Dr. Q. Readings
52 No. 47 Writing-table
53 No. 48 Wood-board Method
54 No. 49 Cardboard Clipboards
55 No. 50 HULL-Poole Universal Reading Act