Ah, I see. Thanks for that.
I had my suspicions when I looked up the kunyomi for 塚.
The 手紙(~がみ) example was perfect. I only just managed to memorize the Kanji for it last week, heh.
So this is something you would normally only see in a compound Kanji?
Do you know if there are any local dialects/slang which would use this in any other manner?
I just want to be prepared in case I encounter it in any other situation.
Many thanks.