I think she must have hid it in some outhouse, and fetched it the next night.
There were tools and a joiner's bench in an outhouse, and there he worked.
"In the outhouse you will find a considerable quantity of straw," said Holmes.
The landlord led them to an outhouse, in which were some trusses of straw.
With this he retired, and blubbered a good hour in an outhouse.