Information I've so far discovered.
Chris
per Tennent A J: "British Merchant Ships sunk by U-Boats in the 1914-1918 War", pub 1990, author, Chipstead, Kent, ISBN 0951631403 :p135
Hermione, ex Yarrawonga, 4011 tons, built 1891, sunk 14Apr17, struck a mine and sunk in St George's Channel, 1½ miles S from Coningbeg Light Vessel, laid by UC-33, while on a voyage from Buenos Aires to Liverpool with general cargo and a consignment of horses.
She was owned at this time by R P Houston & Co, of Liverpool.
I hope this is a useful addition to your write up.
Graham