Small rectangular hole in 1930s concrete subfloor

[JP_]

Just curious, what is this hole for? Was it part of the construction?
I stuck a breadknife down it (using to cut insulation boards, not because I was making sandwiches in there) and just hit dirt, I think.

 

[footprints]

Concrete squareworm perhaps?
I suspect it was a peg to get a level, removed after screed and not made good, but that's only a guess.

 

[JohnD]

dimensions?

 

[Ian H]

View attachment 146953

Could have been a stake to tie Dougal’s lead to?

 

[John D v2.0]

I agree with footprints, we had the same in the concrete foundation for our garden wall, and i was puzzling over it for ages until i realised it was a long departed wooden stake!

 

[Nige F]

dimensions?

It depends on the length of the broomhead next to it

 

[JP_]

I did think about measuring it, as I knew somebody would ask. But I didnt. Covered up now.