The first reference I came across was in Coin Market Values in 1998, described as 1858 8/9 Large Rose, not having seen one or an image I thought it could have been a reference to a full rose, as most CP1858 are missing the top petal. It wasn't until several years later I found my first one. I thought at first it was a Penny Obv paired with Halfpenny Reverse until I looked at the trident.