Site icon Hip-Hop Website Design and Development

How do you find the logo code on theme file or where can I find the header theme file?

I am trying to find the header.php file and/or the code for the logo on any theme file. Under appearance- editor section of my website ( www.pithandsubstance.com ) I can only find function.php and style.php files.

Please note : I am new to WordPress and highly detailed instructions will be very appreciated.

Thank you in advance,

PS