  Motivated by a Steinhaus-like interior-point property involving the
Cameron-Martin space of Gaussian measure theory, we study a group-theoretic
analogue, the Steinhaus triple $(H,G,\mu)$, and construct a Steinhaus support,
a Cameron-Martin-like subset, $H(\mu)$ in any Polish group $G$ corresponding to
`sufficiently subcontinuous' measures $\mu$, in particular for `Solecki-type'
reference measures.
