Hello Slider-
There are various resources collectors use to research ballplayers' records and their cards. Baseball-reference.com indicates that there were 23 different Bonners that have played in the minor leagues (
LINK), your grandfather being one of them (
LINK). Another website we use is vintagecardprices.com which provides a record of prices paid for cards, and is also useful for check listing the various cards issued for a player [
LINK]. In the case of cards enumerated for Bonner vcp.com lists a T209 and two T210s. These are for a different Bonner. They also list the Obaks for 1910 and 1911 plus the T4 cabinet for your grandfather. What surprises me is that the list doesn't show any Zeenuts (a PCL issue in those days). Al Bonner was pretty busy at San Francisco, Seattle and Tacoma in the 1910s and you'd half-expect him to have a few Zeenuts. Googling "Bonner Zeenut" indicates there was at least one in 1912 when he was with SF; I wonder if there were cards for other years. One of our Zeenut experts might know better. Good luck in your search.
ETA: Just gave my PCL cards a once over. No Bonners. Sorry. There is a terrific little card show in Seattle (actually Shoreline) twice a year. Next one is in June. There are some really big hitters in the collecting world, veritable walking PCL encyclopedias, that regularly show up. Might be worth your while to drop by.