Willane; Edward Victor: Methods for Miracles No.4 The Late E.G. Brown's Diminishing Cards ©1951 (circa) William H. Lane, England Softcover, saddle-stitched, 6.5"x8.5", 16 pages

Image courtesy eBay seller RaolsonMagic

Comments: Described and Illustrated by Edward Victor. Six cards apparently diminish in four different sizes. Includes how to make the gimmicked cards. Originally part of a set of 14 manuscripts, these were later compiled into Willane's Complete Methods for Miracles, edited by Hammond Rae, along with four additional entries and Pen Portraits of the Authors.  Distributed in the USA by The Fleming Book Company, PA.

Contents (Partial, from page images):

3 The Late E.G. Brown's Diminishing Cards (Edward Victor)
4 Requirements: using Poker size, Patience Size, Small Patience size and a half small patience sized cards
5 Construction
5 Setup
6 Performance
11 The Second Change
14 A Suggested Addition (Edward Victor)