"Sketches for the study of..."

...shadow on the wall

...hole in marble

...chewing gum on the pavement

...paint on transformer box

...butt in a puddle

...urine on the street

...dirty pavement (saliva, chewing gums, urine etc.)

...hole in a window

...doodle

...urine at the street

...leak under the bridge

...dust in a puddle on the roof

...tar on asphalt (1)

...tar on asphalt (2)

...saliva on a street

...scratches on the floor

...trail of the glass

...butt and small leaf

...sticker in a heart shape on the floor

...trail after cloth

...dust on the sill

...saliva on the pavement

...pigeon's shit

...chewing gum

...and more