Hi

I spotted your message regarding William TAYLOR on Ancestry and whilst I do not have a transcript of his trial for robbery and wounding, I did find this:

Taylor William 8436 10y 22 York 05 10 1863 Robbery & wounding

Source: http://www.convictcentral.com/

You will probably have to type 'Racehorse' into the search field as did.

The Borthwick Institute may help you to locate the transcript if you quote the reference number 8436 along with the date of the trial at York Assizes: 5th October 1863.