This is the div id header in your header.php file:
<div id="header">
<ul id="topnav">
<li><a href="https://www.letricoteuse.net" id="navHome" title="Posted Recently" accesskey="h">Home</a> |
<li><a href="/?page_id=6/" id="navAbout" title="About the Author" accesskey="a">About</a> |
<li><a href="/?page_id=5/" id="navLinks" title="Recommended Links" accesskey="l">Links</a>
</ul>
<h1><a href="https://www.letricoteuse.net" title="Le Tricoteuse">Le Tricoteuse</a></h1>
<div id="desc"></div>
</div>
That is all wrapped in a header div tag. The header div tag is defined in the stylesheet. This is how your deader div is defined in your stylesheet:
#header {
background:#fff url('https://img.photobucket.com/albums/v22/moontheloon/header.png') no-repeat bottom;
height:183px;
width:760px;
border:#fc9 0 solid;
margin:0 auto;
padding:0;
}
It is looking for header.png image in that photobucket location. That needs to change in order for your image to appear, unless you just want to rename the image you want to have as your header (knittingdailytop.png) to “header.png”. That may actually be easier.