my favourite part of this serial has to be when the mummies crush a guy with the power of two pairs of enormous knockers. absolute peak camp. However the writers and costumers were not really on the same page. Whilst Sarah Jane's dress is a 1910s day dress, she lacks the 1910s undergarments like a corset or even petticoats giving her the wrong silhouette for the time period. Generally her dress is appropriate for 1911 as she doesn't need to be super fashionable but she would blend in better if she put her hair up. Ultimately though her blending in is irrelevant as pretty much anyone she meets in this serial dies. it very much gives the vibes of someone dressing up in period clothes for fun.