Walter McGrail

Career overview

Role: Meticulous television and film archivist.
Task: Write a career overview of Walter McGrail (Acting).
Constraints:
Use ONLY verifiable facts from provided SYNOPSIS and SOURCES.
No invented titles, names, dates, counts, awards, etc.
Original, neutral, encyclopedic prose.
Plain text only (no markdown, asterisks, headings, bullet points).
Word count: 180-260 words.
Structure: 2-3 short paragraphs.
No preamble or JSON.
Name: Walter B. McGrail.
Profession: American film actor.
Birth: October 19, 1888 (or October 18, 1888 per TMDB source [1], but [2], [3], [4], [6] say October 19) in Brooklyn, New York, USA.
Death: March 19, 1970 (81 years old) in San Francisco, California.
Career Span: More than 150 films between 1916 and 1951.
Notable Works:
The Scarlet Runner (a 12-chapter serial).
Special Agent K-7 (1936).
The River of Romance (1929).
The American Beauty (1927).
Known For: Acting.
Paragraph 1: Introduction and biographical context.
Walter B. McGrail was an American film actor. Born in Brooklyn, New York, on October 19, 1888, he had a career that spanned several decades of the twentieth century. He died in San Francisco, California, on March 19, 1970, at the age of 81.
Paragraph 2: Career details and filmography.
During his career, McGrail appeared in more than 150 films between the years 1916 and 1951. His work included feature films as well as serials, such as the 12-chapter serial The Scarlet Runner. Among his known credits are the films Special Agent K-7 from 1936, The River of Romance from 1929, and The American Beauty from 1927.
Draft 1 word count check:
"Walter B. McGrail was an American film actor. Born in Brooklyn, New York, on October 19, 1888, he had a career that spanned several decades of the twentieth century. He died in San Francisco, California, on March 19, 1970, at the age of 81.

During his career, McGrail appeared in more than 150 films between the years 1916 and 1951. His work included feature films as well as serials, such as the 12-chapter serial The Scarlet Runner. Among his known credits are the films Special Agent K-7 from 1936, The River of Romance from 1929, and The American Beauty from 1927."

Word count: ~115 words. This is too short (target is 180-260). I need to expand using only the provided facts without inventing anything.
Expanding the content (carefully):
I can elaborate on the specific dates and locations provided.
Source [1] says Birthday: October 18, 1888.
Sources [2], [3], [4], [6] say October 19, 1888.
I will stick to the most consistent date or mention the discrepancy if necessary, but usually, an archivist picks the most supported one. I'll use October 19.

Let's try to flesh out the