The Only Use of

glimpse
in
The Call of the Wild

It stood back from the road, half hidden among the trees, through which glimpses could be caught of the wide cool veranda that ran around its four sides.†
p. 4.3

glimpses = briefly sees; or instances of briefly seeing

Definition:

a quick look or partial understanding

The exact meaning of glimpse can depend upon its context. For example:

"I caught a glimpse of her when I was walking to class." -- a very quick look
"I glimpsed at the headlines." -- looked quickly
"Reading the book gave me a glimpse of the life of a devout Muslim immigrant in America." -- a quick, incomplete view