The analyses of a text #2

The narrator recalls his adolescence.
He is an apprentice for the lawyer Mr. Spenlow.
He is crazy for her only daughter, Dora.
He has gone out with her after his love confession
His grand aunt and her best friend came to London after her going bankrupt.
Now, He wants to cancel his apprenticeship for some of the tuition.

'You are very good, sir,' I murmured, anticipating a concession.
'Not at all. Don't mention it,' said Mr. Spenlow. 'At the same time, I was going to say, if it had been my lot to have my hands unfettered - if I had not a partner - Mr. Jorkins -'
My hopes were dashed in a moment, but I made another effort.
'Do you think, sir,' said I, 'if I were to mention it to Mr. Jorkins -'
Mr. Spenlow shook his head discouragingly. 'Heaven forbid, Copperfield,' he replied, 'that I should do any man an injustice, still less, Mr. jorkins. But I know my partner, Copperfield. Mr. jorkins is not a man to respond to a proposition of this peculiar nature. Mr. jorkins is very difficult to move from the beaten track. You know what he is!'
[David Copperfield by Charles Dickens]
1. I'd like to know if "still less" modifies "Mr. jorkins."
2. And I'd like to know what "the beaten track" means.
Thank you in advance for your help.