Goulstan Street Graffito.

[DJA]

Meh. Next thing you know, you will be writing on them with chalk to see how long it takes for the rain to wash it away
It will than enter your mind that one side of the house might be more prone .....

[Callmebill]

I live in a house built in 1865. The bricks are 8 x 4 inches, although the length varies from 8-8.5.
I can't believe I just went outside to measure a ruddy brick!

[Abby Normal]

I haven't seen many bricks four inches tall.

I think he meant when they’re laying on there side, like how they’re usually stacked to build something like a wall.

[DJA]

https://en.wikipedia.org/wiki/Brick#Optimal_dimensions,_characteristics,_and_strength

US bricks are typically smaller.

[Hunter]

I haven't seen many bricks four inches tall.

[Callmebill]

Goulston Street graffito. A brick is eight x four inches. Sergeant Halse stated: The writing is in good schoolboys script, 3/4 of an inch.The writing formed three lines ... To fit the bricks, and to scale, it would need to be placed similarly to this :

Jews, Juwes, Jewes, Jeuwes, Juwes, Jeuws, Juewes or Juews? These were the variant spellings according to different author's reports. The mid-line scrawl caused confusion. Writing on a brick wall, with chalk, isn't likely to assist legibility.
In this drawing I've used letters from Saucy Jack and Dear Boss missives