Good to see I'm not the only one.
I know that the Reports page was the closest thing to this. The idea, however, I think was sparked by my lack of understanding as to how the money system here works. I've had thousands of in-game currency seemingly disappear and reappear, and I know not whether that's because auctions take the money out of your balance to ensure you can pay, or because there was a series of transactions that I simply did not remember.
I, of course, understand that it would take a fair portion of memory to recall everyone's transactions from way back when the site started to now, so I'm not suggesting anything that would eventually become as long-winded as that. Rather, an overview of all transactions over the past couple of days, with an option to see maybe two weeks back, should suffice for the immediate needs of anyone who finds it as challenging to keep track of everything as me.
Links were suggested for ease of use for the users. As mentioned by Nightingale, there are a lot of 'Nameless' beasts, and I, myself, only seem to find the energy needed to name beasts I intend on keeping. Such is the trend, so it would be easier to figure out exactly which one got that level, or doubled the number of children they'd sired.