June 29th, 1885. At 3 am it has occurred to me that
My plan of taking the [illegible] from the
Corwin A bricks, [illegible] have a very extensive application
To the common rectangular brick. If taken out of such a
Brick (1) its building capacity could be largely increased with
The same weight (2) Walls laid in the common way may
Have every brick so hollowed as to add greatly to their warmth
And dryness, etc. (3) Such walls would be much stronger than
When laid with a solid brick for the mortar crowding
Up into the edges of the hollow in [illegible] would bind
Brick to brick as to as to some [illegible]
Found on top of each brick (4) the open space on top
Admits of using metallic binder in such a way as 
to secure a strong solid wall with no [illegible] 
outside. Shall try today to have mold made 
to make a brick 8 1/2 x 4 1/4 x 2 1/2 when brick is burnt. 
June 30th William Marrell who has been making my [illegible] 
has made me last week a [illegible] 
brick [illegible] shape to stand on edge, but many without 
[illegible] 8 1/2 x 4 1/4 x 2 1/2 with my [illegible] hollow 
Should much prefer them to those hollowed to lay foundation [illegible] 
common brick for I [illegible] way of building. Today he 
makes me molds for three of my style of hollow brick hand 43 



