The desire to retain certain things as belonging to oneself is not altogether unnoticeable among animals.
"A Grammar of Freethought"
Chapman Cohen
No crowd was present, yet enough people were at the tables, or lounging about the pier, to make his presence unnoticeable.
"The Case and The Girl"
Randall Parrish
Very nearly always it is an apparently little mistake that does most damage in the end, something unnoticeable at the time, that grows in geometrical proportion, minus instead of plus.
"King--of the Khyber Rifles"
Talbot Mundy