References in vintage literature ? I gave the heap a shove above the lip in the entrance. The following moment there arrived up from down below a howl of rage. encroachment, intrusion, invasion - any entry into a place not Beforehand occupied; "an invasion of travelers"; "an invasion of locusts" https://entrancemats01122.therainblog.com/36410937/little-known-facts-about-entrance-mats