Hollow and [illegible] walls built with Corwin Brick and G. 
[illegible] June 16th 1885 6pm [illegible] brick to
Be used in [illegible] of Corwin wall, solid or hollow
And these bricks all to stand on edge then a great saving in
Material weight of these bricks can be effected where grouting is
Not used by [illegible] each brick having
A hollow 5 x 2 inches. Even when these bricks are
Laid so as to fill all the space so as to look solid
Above and below, more than half of the spaces they fill
Would be hollow and a much better hollow wall can thus
Be built then in such structures as the cellar walls made
By the so called large hollow brick of Chautauqua Falls
New York. It will be seen that if the bricks were laid flat 
this could not be done as the spaces would fill more or 
less with mortar. I can claim this form and all its advantage 
in condition with Corwin walls wherever there 
are one or more inside [illegible] brick 
thus the 13 inch hollow wall with [illegible] if only on 2 inch hollow was 
allowed for would have the solid part with a very considerable 
hollow and if built with two [illegible] cell this 
brick [illegible] and [illegible] all solid would still answer 
largely all the ends of hollow walls and for [illegible] 
strength might answer all practical [illegible] where 
largely [illegible] 11th early this AM 
the following plan suggested itself to me. Make [illegible] 11 inches long 
this makes 14 inch wall [illegible] hollow in center 
common size brick [illegible] hollow in middle as above [illegible] 
take out from one side centrally of the [illegible] 3 x 1 x 3 1/2 this
hollow to come on lower part of brick and made so as to lighten 



